Book 5 Sources

1. What is a hollow-point bullet?

https://www.ballisticmag.com/bullet-physics-gunshot-wound-survival/

https://www.forbes5.pitt.edu/article/production-muskets-and-their-effects-eighteenth-century

https://en.wikipedia.org/wiki/Bullet

https://www.agirlandagun.org/4-components-of-a-cartridge/

https://www.muddybay.com/blog/full-metal-jacketfmj-ammo-vs-hollow-point-rounds–31757

https://www.usconcealedcarry.com/blog/what-is-hollow-point-ammo/

https://en.wikipedia.org/wiki/Hollow-point_bullet

2. Why does the body produce fat?

https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/digestive-system

https://journals.biologists.com/jcs/article/122/6/749/30731/Lipid-droplets-at-a-glance

https://en.wikipedia.org/wiki/Adipocyte

https://www.cdc.gov/healthyweight/assessing/bmi/adult_bmi/metric_bmi_calculator/bmi_calculator.html

https://www.nih.gov/news-events/nih-research-matters/where-fat-comes

https://www.texasheart.org/heart-health/womens-heart-health/straight-talk-newsletter/obesity-the-facts-about-fat/

https://my.clevelandclinic.org/health/body/24052-adipose-tissue-body-fat

https://en.wikipedia.org/wiki/Adipose_tissue

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4587882/

https://researchmatters.in/news/scientists-study-how-insulin-helps-us-digest-fats

https://scrubbing.in/6-simple-ways-to-prevent-blood-sugar-spikes-after-meals/

3. Why was the FBI formed?

https://en.wikipedia.org/wiki/Law_enforcement_in_the_United_States

https://en.wikipedia.org/wiki/Federal_Bureau_of_Investigation

https://www.pbs.org/wgbh/americanexperience/features/dillinger-rise-fbi/

https://www.fbi.gov/history/brief-history

https://en.wikipedia.org/wiki/Leon_Czolgosz

https://www.history.com/this-day-in-history/fbi-founded

https://www.newyorker.com/magazine/2020/07/20/the-invention-of-the-police

4. What causes rigor mortis? Warning – these links contain images you might not want to see.

https://www.sciencedirect.com/topics/medicine-and-dentistry/rigor-mortis

https://www.yalescientific.org/2010/02/everyday-qa-what-causes-rigor-mortis/

https://en.wikipedia.org/wiki/Rigor_mortis

https://courses.lumenlearning.com/suny-ap1/chapter/muscle-fiber-contraction-and-relaxation/

https://www.visiblebody.com/learn/muscular/muscle-contractions

https://biologydictionary.net/actin-and-myosin/

https://www.thoughtco.com/what-causes-rigor-mortis-601995

https://www.ncbi.nlm.nih.gov/books/NBK549867/

5. How do you get water to the top of a skyscraper?

https://www.physicsforums.com/threads/pump-has-a-suction-lift-of-more-than-10-3-m.937011/

https://blog.bermad.com/building-and-construction/meeting-the-challenge-of-water-supply-in-high-rise-buildings

https://www.sloan.com/resources/education/infographics/how-water-works-skyscrapers

https://www.nuflowmidwest.com/how-potable-water-rises-to-the-top-floor-of-your-building/

https://www.physlink.com/Education/Askexperts/ae443.cfm

https://www.youtube.com/watch?v=PgxSD6H799Q

https://en.wikipedia.org/wiki/Atmospheric_pressure

https://www.popularmechanics.com/home/how-to/a152/1275136/

https://chucta.com/how-does-a-water-pump-work/

https://towle-whitney.com/how-to-maintain-water-pressure-in-high-rise-buildings/

https://www.freshwatersystems.com/blogs/blog/what-is-a-water-booster-pump-and-how-does-it-work

6. How is blood pressure measured?

https://www.neofect.com/us/blog/why-maintaining-healthy-blood-pressure-important

https://www.mayoclinic.org/tests-procedures/blood-pressure-test/about/pac-20393098

https://www.cdc.gov/bloodpressure/measure.htm

https://www.ncbi.nlm.nih.gov/books/NBK279251/

https://biology.stackexchange.com/questions/88954/what-is-the-human-energy-consumption-by-organ

https://www.healthline.com/health/largest-organs-in-the-body#bottom-line

https://byjus.com/question-answer/how-much-amount-of-blood-is-pumped-during-each-heartbeat-100-ml-55-ml-50/

https://courses.lumenlearning.com/wm-biology2/chapter/blood-pressure/

https://www.cdc.gov/bloodpressure/about.htm

https://www.bbc.co.uk/bitesize/guides/zwbwpbk/revision/2

https://science.howstuffworks.com/innovation/everyday-innovations/question146.htm

7. What causes a bunged-up nose and a runny nose?

https://kidshealth.org/en/kids/nose.html

https://www.visiblebody.com/learn/respiratory/upper-respiratory-system

https://delmar.cz/en/noseandhealth/noseusage

https://en.wikipedia.org/wiki/Nasal_congestion

https://en.wikipedia.org/wiki/Decongestant

https://en.wikipedia.org/wiki/Pseudoephedrine

https://en.wikipedia.org/wiki/Rhinorrhea

https://vicks.com/en-us/symptom/nasal-congestion

https://my.clevelandclinic.org/health/symptoms/21660-inflammation

https://www.advil.com/symptoms-tips/cold-flu-sinus/congestion/truth-about-nasal-congestion/

8. What is the range of a cell phone tower?

https://millmanland.com/company-news/what-is-a-cell-tower-and-how-does-a-cell-tower-work/

https://dgtlinfra.com/cell-tower-range-how-far-reach/

https://smallbusiness.chron.com/advantages-cdma-wireless-technology-55277.html

https://portal.ct.gov/lib/csc/miscellaneous/cell_phone_tower_final_may_2015.pdf

https://www.simbase.com/learning/how-mobile-networks-work

https://techwithtech.com/cell-phone-pinging-cell-towers-how-often-when/

https://toweradvantage.com/how-does-a-cell-tower-actually-work/

https://www.wilsonpro.com/blog/how-building-materials-affect-cell-phone-signal-booster-performance

9. Why do dry rooms have more static?

https://en.wikipedia.org/wiki/Static_electricity

https://www.loc.gov/everyday-mysteries/physics/item/how-does-static-electricity-work/

https://www.condair.com/humidifiernews/blog-overview/why-does-low-humidity-cause-static-electricity

https://www.actionnews5.com/2018/12/19/breakdown-why-theres-so-much-static-winter/

https://aristair.com/blog/what-you-dont-know-about-static-is-shocking-consider-humidification/

https://justenergy.com/blog/electric-shock-what-how-and-why-dangerous/

https://www.reddit.com/r/askscience/comments/1ph1f2/what_exactly_causes_the_pain_from_a_static_spark/

https://www.baypower.com/blog/is-lightning-static-electricity/

https://www.msichicago.org/science-at-home/hands-on-science/static-cling/

https://mangocleaners.com/shocking-truth-static/

https://www.scienceworld.ca/resource/conducting-currents/

10. Can you see past the horizon?

https://emtoolbox.nist.gov/wavelength/documentation.asp

https://en.wikipedia.org/wiki/List_of_refractive_indices

https://www.sciencelearn.org.nz/resources/49-refraction-of-light

https://physics.stackexchange.com/questions/274935/how-can-the-speed-of-light-change-in-the-medium-when-we-know-that-it-is-always-e

https://www.olympus-lifescience.com/en/microscope-resource/primer/lightandcolor/speedoflight/

https://www.forbes.com/sites/jillianscudder/2016/04/05/astroquizzical-speed-of-light-tests/?sh=1f84f5142409

https://flexbooks.ck12.org/cbook/cbse-physics-class-10/section/2.6/primary/lesson/atmospheric-refraction/

https://thatsmaths.com/2021/06/17/seeing-beyond-the-horizon/

https://www.wral.com/atmospheric-ducting-allows-us-to-see-beyond-the-horizon/17750430/

https://www.irishtimes.com/news/science/seeing-beyond-the-horizon-1.4587533

https://en.wikipedia.org/wiki/Atmospheric_refraction

https://physics.stackexchange.com/questions/693851/is-it-possible-to-see-behind-the-horizon-because-of-light-refraction

https://en.wikipedia.org/wiki/Horizon

11. How does a laser printer work?

https://techglimpse.com/brother-unveils-worlds-fastest-laser-printer-print-100-pages-minute/

https://en.wikipedia.org/wiki/Laser_printing

https://www.xerox.com/en-us/office/insights/laser-printers

https://www.binarytides.com/best-high-speed-laser-printers/

https://www.reliancedigital.in/solutionbox/your-next-printer-should-be-a-laser-printer-heres-why/

https://home.howstuffworks.com/photocopier6.htm

https://www.thehealthyjournal.com/faq/why-is-it-rgb-instead-of-ryb

https://oneilprint.com/cmyk-color-process/

https://www.printerland.co.uk/blog/how-does-an-inkjet-printer-work/

https://www.printerland.co.uk/blog/how-does-a-laser-printer-work/

https://www.brother.co.uk/support/answers/how-does-a-laser-printer-work

https://www.tonergiant.co.uk/blog/2016/12/how-laser-printers-work-ultimate-guide/

https://www.explainthatstuff.com/laserprinters.html

12. How can the inner core of the Earth switch rotation?

https://www.lpi.usra.edu/education/explore/ice/background/allAboutWater/

https://pubmed.ncbi.nlm.nih.gov/23620049/

https://scienceline.ucsb.edu/getkey.php?key=5

https://geologyscience.com/geology-answer/the-earths-layers/

https://en.wikipedia.org/wiki/Earth%27s_mantle

https://en.wikipedia.org/wiki/Earth%27s_inner_core

https://en.wikipedia.org/wiki/Earth%27s_outer_core

https://www.calacademy.org/explore-science/from-core-to-crust-defining-earths-layers

https://education.nationalgeographic.org/resource/crust/

https://education.nationalgeographic.org/resource/core/

https://education.nationalgeographic.org/resource/mantle/

https://www.euronews.com/next/2023/02/10/making-heads-spin-scientists-say-earths-inner-core-has-changed-its-rotation

13. Is Krav Maga effective?

https://www.kravmaga.com/3-reasons-krav-maga-is-the-most-effective-self-defense-system/

https://www.reddit.com/r/kravmaga/comments/38hv71/so_how_effective_is_krav_maga_really/

https://mmachannel.com/is-krav-maga-effective-what-you-need-to-know/

https://www.youtube.com/watch?v=EUIv8Y5oG6U&t=594s

https://en.wikipedia.org/wiki/Imi_Lichtenfeld

https://en.wikipedia.org/wiki/Krav_Maga

14. Why can camels go so long without water?

https://factopolis.com/how-long-can-a-giraffe-go-without-water/

https://www.quora.com/Can-a-camel-drink-53-gallons-200-liters-of-water-in-3-minutes

https://earthsky.org/earth/do-camels-store-water-in-there-humps/

https://nanaimonewsnow.com/2019/03/18/if-camel-humps-dont-contain-water-whats-inside/

https://www.loc.gov/everyday-mysteries/zoology/item/how-much-water-does-a-camels-hump-hold/

https://www.britannica.com/story/do-camels-store-water-in-their-humps

https://en.wikipedia.org/wiki/Camel

https://wildlifeinformer.com/how-long-can-a-camel-go-without-water/

https://animals.howstuffworks.com/mammals/camel-go-without-water1.htm

15. Why can you test for drugs in urine?

https://organicindiausa.com/blog/liver-and-kidney/

https://www.moravek.com/how-drugs-are-metabolized-in-the-body/

https://www.aruplab.com/files/resources/pain-management/DrugAnalytesPlasmaUrine.pdf

https://sunrisehouse.com/addiction-info/path-drugs-take-body/

https://www.kidney-international.org/article/S0085-2538(15)32394-2/fulltext

https://www.msdmanuals.com/en-jp/professional/clinical-pharmacology/pharmacokinetics/drug-metabolism

https://www.medicalnewstoday.com/articles/how-long-does-cocaine-stay-in-your-system#how-long

https://www.msdmanuals.com/en-jp/home/drugs/administration-and-kinetics-of-drugs/drug-elimination

https://www.surehire.com/urine-testing-101-screened-substances-detection-window-and-benefits/

https://www.testing.com/tests/urine-drug-test/

https://www.ncbi.nlm.nih.gov/books/NBK547662/

16. How did the Rothschild family start?

https://en.wikipedia.org/wiki/Court_Jew

https://en.wikipedia.org/wiki/Mayer_Amschel_Rothschild

https://en.wikipedia.org/wiki/William_I,_Elector_of_Hesse

https://en.wikipedia.org/wiki/Amschel_Mayer_Rothschild

https://en.wikipedia.org/wiki/Rothschild_family

https://en.wikipedia.org/wiki/Usury

https://www.jewishhistory.org/the-rothschilds/

https://en.wikipedia.org/wiki/Money_changer

http://vanosnabrugge.org/docs/dutchmoney.htm

https://iisg.amsterdam/en/research/projects/hpw/calculate.php

https://upload.wikimedia.org/wikipedia/commons/5/5c/Rothschild_Jew.Encyclopedia_1912%2C_Band_10%2C_S.491.jpg

https://www.snopes.com/fact-check/rothschild-family-wealth/

https://www.celebritynetworth.com/richest-businessmen/rothschild-family-net-worth/

https://skeptoid.com/episodes/4311?gclid=CjwKCAiAr4GgBhBFEiwAgwORrcV0mC0ZqbEPzji4g72x9egiMJrzA_MFlN_w-OPStl1aGL63qn3lYRoCNrkQAvD_BwE

https://www.investopedia.com/updates/history-rothschild-family/

https://www.businessinsider.com/the-early-rothschilds-built-a-fortune-2012-12#revolutions-both-in-nations-and-technology-are-what-gave-mayer-a-real-fortune-8

17. How do astronomers work out how far away a star is?

https://www.space.com/30417-parallax.html

http://www.astro.ex.ac.uk/people/hatchell/rinr/candles.pdf

https://www.gigacalculator.com/converters/convert-parsec-to-light-year.php

https://www.toppr.com/ask/en-jp/question/what-is-the-parallax-formula-and-how-is-it-used-to-calculate-the-distance-between/

https://physics.stackexchange.com/questions/286309/how-is-the-parallax-angle-actually-measured

https://science.howstuffworks.com/question224.htm

https://lco.global/spacebook/distance/what-is-distance-modulus/

https://lco.global/spacebook/distance/cepheid-variable-stars-supernovae-and-distance-measurement/

https://lco.global/spacebook/distance/parallax-and-distance-measurement/

https://en.wikipedia.org/wiki/Minute_and_second_of_arc

https://en.wikipedia.org/wiki/Parallax

https://www.schoolsobservatory.org/learn/maths/distance/parallax

18. How do mountain goats climb cliffs?

https://en.wikipedia.org/wiki/Mountain_goat

https://www.youtube.com/watch?v=lR1Yk3GAY5E&t=29s

https://www.nationalgeographic.com/animals/mammals/facts/mountain-goat

http://thescienceexplorer.com/nature/how-mountain-goats-ascend-nearly-vertical-cliffs

https://www.sciencedirect.com/science/article/abs/pii/S0944200616300514

https://www.youtube.com/watch?v=EohJPi5iYPs

https://weather.com/photos/news/mountain-goats-how-do-they-do-it

https://www.nwf.org/Magazines/National-Wildlife/1997/King-of-the-Mountain

https://naturecanada.ca/news/blog/high-climbers-mountains-goats-earn-their-name/

https://www.reddit.com/r/NoStupidQuestions/comments/9d906p/why_arent_mountain_goats_afraid_of_heights/

19. How does C-4 work?

http://www.chm.bris.ac.uk/motm/tnt/tntjs.htm

https://en.wikipedia.org/wiki/Polybutene

https://en.wikipedia.org/wiki/Composition_C

https://en.wikipedia.org/wiki/Dioctyl_sebacate

https://en.wikipedia.org/wiki/RDX

https://www.osti.gov/servlets/purl/3648

https://www.chem.fsu.edu/chemlab/chm1020c/Lecture%207/04.php

https://veteranlife.com/military-history/c4-explosive/

https://science.howstuffworks.com/c-4.htm

https://www.quora.com/How-is-a-C4-detonated

https://www.fema.gov/pdf/plan/prevent/rms/426/fema426_ch4.pdf

20. Is a psychopath’s brain different?

https://www.bbc.com/future/article/20180518-can-you-ever-change-a-violent-psychopaths-mind

https://en.wikipedia.org/wiki/Psychopathy

https://blog.oup.com/2021/04/what-can-neuroscience-tell-us-about-the-mind-of-a-serial-killer/

https://en.wikipedia.org/wiki/Psychopathy_Checklist

https://www.healthline.com/health/psychopath#diagnosis

https://en.wikipedia.org/wiki/Diagnostic_and_Statistical_Manual_of_Mental_Disorders

https://scitechdaily.com/scientists-have-established-a-key-biological-difference-between-psychopaths-and-normal-people/

https://en.wikipedia.org/wiki/Striatum

https://www.med.wisc.edu/news-and-events/2011/november/psychopaths-brains-differences-structure-function/

21. How are foods frozen?

https://www.sciencedirect.com/science/article/abs/pii/S1359431111007101

https://cablevey.com/a-guide-to-frozen-food-processing-and-packaging/

http://www.foodreference.com/html/a-commercial-freezing-1208.html

https://en.wikipedia.org/wiki/Halocarbon

https://extension.umn.edu/preserving-and-preparing/science-freezing-foods

https://en.wikipedia.org/wiki/Frozen_food

https://www.industrialfansdirect.com/blogs/info-center/75807044-fans-and-forced-convection-in-process-cooling

https://ask.usda.gov/s/article/How-long-can-you-freeze-beef

https://www.highspeedtraining.co.uk/hub/how-long-can-you-store-frozen-food-for/

https://en.wikipedia.org/wiki/Freezer_burn

22. Why can’t we fix frostbite?

https://www.nhs.uk/conditions/frostbite/

https://www.mayoclinic.org/diseases-conditions/frostbite/symptoms-causes/syc-20372656

https://en.wikipedia.org/wiki/Frostbite

https://www.healthline.com/health/frostbite-stages

https://www.thenakedscientists.com/articles/questions/why-frostbite-black

https://my.clevelandclinic.org/health/diseases/21070-gangrene

https://www.hopkinsmedicine.org/health/conditions-and-diseases/gangrene

23. How strong is armadillo armor?

https://h-o-m-e.org/are-armadillos-bulletproof/

https://www.zoology.ubc.ca/~millen/oldvertebrate/skeleton.htm

https://northamericannature.com/why-does-an-armadillo-have-a-shell/

https://www.nationalgeographic.com/animals/article/animals-armor-bioinspiration

https://www.pawsgeek.com/how-strong-is-an-armadillo-shell/

https://pubmed.ncbi.nlm.nih.gov/21565719/

https://www.nationalgeographic.com/animals/mammals/facts/armadillos

https://en.wikipedia.org/wiki/Glyptodont

https://en.wikipedia.org/wiki/Dermal_bone

https://en.wikipedia.org/wiki/Scute

https://en.wikipedia.org/wiki/Armadillo

https://www.youtube.com/watch?v=44SDwKtDgac&t=1s

24. What causes narcolepsy?

https://www.hopkinsmedicine.org/health/conditions-and-diseases/narcolepsy

https://en.wikipedia.org/wiki/Narcolepsy

https://www.nhs.uk/conditions/narcolepsy/

https://www.nhs.uk/conditions/narcolepsy/causes/

https://en.wikipedia.org/wiki/Orexin

https://healthysleep.med.harvard.edu/narcolepsy/what-is-narcolepsy/science-of-narcolepsy

https://www.nichd.nih.gov/health/topics/sleep/conditioninfo/causes

https://www.mayoclinic.org/diseases-conditions/narcolepsy/symptoms-causes/syc-20375497

https://www.nature.com/scitable/blog/brain-metrics/are_there_really_as_many/

25. When did people start using flushing toilets?

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7150208/

https://www.history.com/news/who-invented-the-flush-toilet

https://www.smithsonianmag.com/history/turrets-toilets-partial-history-throne-room-180951788/

https://en.wikipedia.org/wiki/Knossos

https://www.baus.org.uk/museum/164/a_brief_history_of_the_flush_toilet

https://english.stackexchange.com/questions/41021/why-is-a-bathroom-sometimes-called-a-john

https://en.wikipedia.org/wiki/John_Harington_(writer)

https://www.exclassics.com/ajax/ajax.pdf

https://en.wikipedia.org/wiki/Flush_toilet

26. Why do eyes get worse with age?

https://ingeniumcanada.org/scitech/education/try-this-out/finding-your-blind-spot

https://www.webmd.com/eye-health/eye-blind-spot

https://www.sciencelearn.org.nz/resources/50-how-the-eye-focuses-light

https://www.optometrists.org/general-practice-optometry/guide-to-eye-health/how-does-the-eye-work/

https://www.mayoclinic.org/diseases-conditions/cataracts/symptoms-causes/syc-20353790

https://wilmingtoneye.com/specialties/cornea/structure-of-the-cornea/

https://www.youreyesite.com/why-vision-gets-worse-with-age/

https://www.scientificamerican.com/article/why-does-eyesight-deterio/

https://www.ucihealth.org/blog/2018/03/aging-eye

https://my.clevelandclinic.org/health/articles/22062-epithelium

https://www.cornea.org/Learning-Center/How-the-Eye-Works.aspx

27. Why are there 12 signs of the Zodiac?

https://en.wikipedia.org/wiki/Zodiac

https://www.britannica.com/topic/zodiac

https://en.wikipedia.org/wiki/Sidereal_and_tropical_astrology

https://www.bbc.com/news/magazine-12207811

https://www.thoughtco.com/why-we-still-use-babylonian-mathematics-116679

https://www.ox.ac.uk/news/arts-blog/ancient-knowledge-transfer-egyptian-astronomy-babylonian-methods

https://en.wikipedia.org/wiki/Babylonian_astronomy

https://en.wikipedia.org/wiki/Decan

https://nasa.tumblr.com/post/150688852794/zodiac?linkId=94146490

https://time.com/5867647/nasa-zodiac-star/

https://arabiannightsrum.com/stars/winter-constellations/taurus/

28. Why do insects have an exoskeleton?

https://www.merriam-webster.com/dictionary/apodeme

https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/exoskeleton

https://www.billnye.com/the-science-guy/insects

https://en.wikipedia.org/wiki/Exoskeleton

https://en.wikipedia.org/wiki/Chitin

https://animals.mom.com/insects-skeleton-outside-body-9265.html

https://study.com/learn/lesson/exoskeleton-advantages-examples.html

https://socratic.org/questions/what-are-the-advantages-and-disadvantages-of-an-exoskeleton

https://biobubblepets.com/the-various-sensors-of-arthropods-and-how-they-use-them-to-survive/

https://www.jstor.org/stable/24993274

29. Is a photographic memory real?

https://www.nature.com/articles/s41386-018-0246-y

https://www.zmescience.com/science/news-science/is-photographic-memory-real-not-quite-but-theres-something-that-comes-close/

https://www.newscientist.com/article/2272135-did-you-know-fewer-than-100-people-have-a-photographic-memory/

https://en.wikipedia.org/wiki/Eidetic_memory

https://www.scientificamerican.com/article/i-developed-what-appears-to-be-a-ph/

https://animalkooky.com/most-forgetful-animals/

https://www.brainfacts.org/thinking-sensing-and-behaving/learning-and-memory/2021/what-memories-are-made-of-100121

https://www.aruma.com.au/about-us/blog/get-to-know-the-real-rain-man-kim-peek/

https://www.psychologytoday.com/us/blog/open-gently/201504/theres-no-such-thing-photographic-memory

https://www.scienceabc.com/humans/why-do-some-people-have-a-better-memory-than-others.html

https://headway.ie/about-brain-injury/introduction-to-the-brain/the-lobes-of-the-brain/

30. What is hyperthermia?

https://my.clevelandclinic.org/health/diseases/22111-hyperthermia

https://en.wikipedia.org/wiki/Hyperthermia

https://www.cancer.gov/about-cancer/treatment/types/hyperthermia

https://www.energy.gov/energysaver/principles-heating-and-cooling

https://newsinhealth.nih.gov/2013/07/stay-cool

https://www.vinmec.com/en/news/health-news/healthy-lifestyle/how-does-the-body-cool-itself/

https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/effects-of-high-temperatures-on-blood-pressure-heart

https://www.physio-pedia.com/Hyperthermia

https://sportmedbc.com/article/hyperthermia/

https://www.mymed.com/diseases-conditions/hyperthermia/what-are-the-phases-and-signs-of-hyperthermia

https://www.mayoclinic.org/diseases-conditions/heat-rash/symptoms-causes/syc-20373276

https://www.brainfacts.org/diseases-and-disorders/injury/2020/what-happens-to-the-brain-during-a-heatstroke-062520

https://www.sciencedirect.com/science/article/abs/pii/S0736467919307395

31. How do some animals walk up walls?

https://berkshire.com/microfiber-wipes-van-der-waals-forces-cell-phones-geckos/

https://www.thoughtco.com/definition-of-electrostatic-forces-604451

https://www.thoughtco.com/definition-of-van-der-waals-forces-604681

https://chem.libretexts.org/…/Van_der_Waals_Forces

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6107968/

https://www.abc.net.au/…/how-ants-and-other-creatures-can-walk-on-the-ceiling/13702210

https://en.wikipedia.org/wiki/Seta

https://www.scienceabc.com/nature/animals/how-do-lizards-climb-walls.html

https://www.nist.gov/image/gecko-setae-and-spatulae

https://www.livescience.com/53415-spiderman-too-big-to-scale-walls.html

https://abcnews.go.com/Technology/FutureTech/story?id=99541&page=1

https://en.wikipedia.org/wiki/Gecko_feet

32. Why are clouds at different heights?

https://www.metoffice.gov.uk/…/what-are-clouds-and-how-do-they-form

https://education.nationalgeographic.org/resource/condensation/

https://www.usgs.gov/…/evaporation-and-water-cycle

https://www.usgs.gov/…/atmosphere-and-water-cycle

https://www.lsop.colostate.edu/…/WhyDoesWarmAirHoldMoreWater.pdf

https://www.davisinstruments.com/pages/what-is-dew-point

https://www.thenakedscientists.com/forum/index.php?topic=25225.0

https://www.weather.gov/…/cloud_development/clouds.htm

https://en.wikipedia.org/wiki/Cloud

https://education.nationalgeographic.org/resource/cloud/

https://www.noaa.gov/jetstream/clouds/how-clouds-form

https://www.reddit.com/…/eli5_why_do_clouds_form_at_the_heights_that_they/

https://www.sciencefocus.com/planet-earth/why-are-there-two-layers-of-clouds/

https://www.weather.gov/jetstream/corefour

33. Why is Greenland part of Denmark?

https://visitgreenland.com/articles/10-facts-nellie-huang/

https://denmark.dk/people-and-culture/greenland

https://en.wikipedia.org/wiki/Greenland

https://en.wikipedia.org/wiki/Treaty_of_Kiel

https://en.wikipedia.org/wiki/History_of_Greenland

https://en.wikipedia.org/wiki/Norse_colonization_of_North_America

https://oceanwide-expeditions.com/faq/who-owns-greenland

https://www.bbc.com/news/world-europe-18249474

https://www.cs.mcgill.ca/~rwest/wikispeedia/wpcd/wp/d/Denmark.htm

https://visitgreenland.com/about-greenland/erik-the-red/

https://en.wikipedia.org/wiki/Denmark

34. What happened to biplanes and triplanes?

https://en.wikipedia.org/wiki/Triplane

https://en.wikipedia.org/wiki/History_of_aviation

https://en.wikipedia.org/wiki/Biplane

https://www.quora.com/What-are-the-pros-and-cons-of-biplane-vs-triplane

https://aviation.stackexchange.com/questions/12143/why-are-there-no-longer-any-biplanes

https://www.reddit.com/…/why_arent_there_any_bitriplanes_anymore/

https://aviation.stackexchange.com/…/biplanes-in-vstol-applications

https://www.aviation.govt.nz/…/basic-stalling/

https://aiimpacts.org/energy-efficiency-of-wright-flyer/

35. Why is a broken neck fatal?

https://orthoinfo.aaos.org/en/diseases–conditions/cervical-fracture-broken-neck/

https://www.self.com/story/heres-exactly-what-happens-when-you-break-your-neck

https://en.wikipedia.org/wiki/Cervical_fracture

https://en.wikipedia.org/wiki/Cervical_vertebrae

https://my.clevelandclinic.org/health/body/21946-spinal-cord

https://my.clevelandclinic.org/health/articles/22278-cervical-spine

36. How is Easter calculated?

https://www.rmg.co.uk/stories/topics/when-easter

https://en.wikipedia.org/wiki/Easter_controversy

https://www.countryliving.com/life/a46407/why-does-easter-change-dates/

https://en.wikipedia.org/wiki/Easter

https://www.timeanddate.com/calendar/determining-easter-date.html

https://www.science.org.au/curious/everything-else/calendars

https://www.timeanddate.com/calendar/gregorian-calendar.html

https://www.history.com/news/6-things-you-may-not-know-about-the-gregorian-calendar

37. Why do fingernails keep growing?

https://biology.stackexchange.com/questions/14216/how-would-constantly-growing-nails-have-aided-early-human

https://www.livescience.com/65277-why-fingernails-keep-growing.html

https://en.wikipedia.org/wiki/Keratin

https://en.wikipedia.org/wiki/Nail_(anatomy)

https://www.nytimes.com/2015/08/25/science/the-inexorable-forces-of-nail-growth.html

https://www.verywellhealth.com/nail-anatomy-growth-structure-and-more-1068848

https://patient.info/news-and-features/why-do-humans-have-nails

38. How do millipedes control their legs?

https://www.frontiersin.org/articles/10.3389/fncir.2021.706064/full

https://www.nwf.org/Educational-Resources/Wildlife-Guide/Invertebrates/Millipedes

https://www.reddit.com/r/askscience/comments/4un1k5/how_do_centipedesmillipedes_control_all_of_their/

https://www.terminix.com/blog/education/centipede-millipede-leg-movement/

https://northernwoodlands.org/outside_story/article/walking-with-many-legs

https://www.etymonline.com/word/millipede

https://brill.com/view/journals/ab/65/2/article-p133_4.xml

https://faculty.washington.edu/chudler/invert.html

https://www.verywellhealth.com/ganglia-5104788

https://en.wikipedia.org/wiki/Millipede

https://www.sciencefocus.com/nature/why-do-millipedes-have-so-many-legs/

https://quailandaardvark.wordpress.com/2016/08/25/why-do-millipedes-have-long-segmented-bodies-with-many-legs-bridget-b/

39. Why are UK public schools actually private schools?

https://www.weareteachers.com/how-many-schools-are-in-the-us/

https://nces.ed.gov/pubs97/97983.pdf

https://nca.school/six-differences-between-private-schools-vs-public-schools/

https://www.britishcouncil.hk/en/stateschools_priavteschools

https://www.funtrivia.com/askft/Question94714.html

https://educationdata.org/average-cost-of-private-school

https://en.wikipedia.org/wiki/Public_school_(United_Kingdom)

http://www.educationengland.org.uk/documents/fleming/fleming.html

https://en.wikipedia.org/wiki/History_of_education_in_England

40. What makes our hands different to other animals?

https://www.smithsonianmag.com/…/how-dexterous-thumbs…/

https://www.scmp.com/…/human-hand-triumph-evolution-opposable-thumbs

https://www.amnh.org/…/the-grasping-hand

https://www.newscientist.com/…/why-do-we-have-five-digits-on-each-hand/

https://www.scientificamerican.com/article/why-do-most-species-have/

https://www.sciencefocus.com/…/why-did-we-evolve-five-digits/

https://www.nationalgeographic.com/…/how-did-you-get-five-fingers

https://en.wikipedia.org/wiki/Thumb

41. What is the difference between a petrol engine and a diesel engine?

https://energyeducation.ca/encyclopedia/Internal_combustion_engine

https://www.vedantu.com/chemistry/difference-between-petrol-and-diesel-engine

https://byjus.com/chemistry/difference-between-diesel-and-petrol-engine/

https://www.tutorialspoint.com/difference-between-petrol-engine-and-diesel-engine

https://en.wikipedia.org/wiki/Otto_cycle

https://www.youtube.com/watch?v=rlK7JIAz9WY

https://www.scienceabc.com/nature/what-is-the-difference-between-petrol-and-diesel.html

https://www.acea.auto/fact/differences-between-diesel-and-petrol/

https://education.nationalgeographic.org/resource/petroleum/

https://www.eia.gov/energyexplained/oil-and-petroleum-products/refining-crude-oil-the-refining-process.php

https://www.iea-amf.org/content/fuel_information/diesel_gasoline/

http://www.nissantechnicianinfo.mobi/htmlversions/2015_August-September%20Issue%203/Diesel_Basics.html

42. Why does the USA use the dollar?

https://dustyoldthing.com/pieces-of-eight-history/

https://en.wikipedia.org/wiki/Spanish_dollar

https://en.wikipedia.org/wiki/Dollar

https://www.investopedia.com/articles/forex-currencies/092316/how-us-dollar-became-worlds-reserve-currency.asp

https://en.as.com/en/2021/09/29/latest_news/1632922119_613188.html

https://mycreditunion.gov/financial-resources/history-united-states-currency

https://en.wikipedia.org/wiki/Early_American_currency

43. What is lichen?

https://www.news-medical.net/life-sciences/What-are-Fungi.aspx

http://www.differencebetween.net/science/difference-between-algae-and-seaweed/

https://haeckels.co.uk/journal/edible-lichen/

https://www.fs.usda.gov/wildflowers/beauty/lichens/didyouknow.shtml

https://www.science.org/content/article/hardy-lichens-don-t-actually-predate-plants

https://www.sciencedaily.com/releases/2019/07/190723163943.htm

https://britishlichensociety.org.uk/learning/what-is-a-lichen

https://en.wikipedia.org/wiki/Algae

https://en.wikipedia.org/wiki/Lichen

https://www.fs.usda.gov/wildflowers/beauty/lichens/about.shtml

https://www.livescience.com/54979-what-are-algae.html

44. Was Ferdinand Magellan really the first person to circumnavigate the world?

https://www.history.com/news/was-magellan-the-first-person-to-circumnavigate-the-globe

https://www.nationalgeographic.com/culture/article/magellan-first-sail-around-world-think-again

https://www.todayifoundout.com/index.php/2013/09/the-first-person-to-circumnavigate-the-world/

https://en.wikipedia.org/wiki/Ferdinand_Magellan

https://en.wikipedia.org/wiki/Strait_of_Magellan

https://www.britannica.com/biography/Ferdinand-Magellan/Allegiance-to-Spain

45. When did April Fools’ Day start?

http://hoaxes.org/af_database/permalink/origin_of_april_fools_day/

https://archive.org/details/remainesgentili01aubrgoog/page/n26/mode/2up?view=theater

https://en.wikipedia.org/wiki/Hilaria

https://time.com/4276140/april-fools-day-history/

https://www.telegraph.co.uk/news/2022/04/01/april-fools-day-2022-today-pranks-origin-meaning-why-called/

https://www.history.com/topics/holidays/april-fools-day

https://en.wikipedia.org/wiki/April_Fools%27_Day

https://blogs.loc.gov/folklife/2016/03/april-fools/

https://www.dictionary.com/e/fool/

https://libguides.ctstatelibrary.org/hg/colonialresearch/calendar

46. How does a cochlear implant work?

https://www.hopkinsmedicine.org/health/conditions-and-diseases/how-the-ear-works

http://hyperphysics.phy-astr.gsu.edu/hbase/Sound/oss.html

https://www.mayoclinic.org/diseases-conditions/hearing-loss/symptoms-causes/syc-20373072

https://www.cdc.gov/nceh/hearing_loss/how_does_loud_noise_cause_hearing_loss.html

https://www.advancedbionics.com/us/en/home/contact-us/blog/articles/history-and-future-of-cochlear-implants-spahr.html

https://www.hopkinsmedicine.org/health/conditions-and-diseases/hearing-loss/how-do-hearing-aids-work

https://www.babyhearing.org/devices/how-does-a-cochlear-implant-work

https://www.nidcd.nih.gov/health/cochlear-implants

https://www.mayoclinic.org/tests-procedures/cochlear-implants/about/pac-20385021

47. How is the Internet connected between countries?

https://www.usg.edu/galileo/skills/unit07/internet07_02.phtml

https://www.scienceandmediamuseum.org.uk/objects-and-stories/short-history-internet

https://www.submarinecablemap.com/

https://www.mentalfloss.com/article/60150/10-facts-about-internets-undersea-cables

https://en.wikipedia.org/wiki/Submarine_communications_cable

https://www.wired.co.uk/article/submarine-internet-cables-egypt

https://edition.cnn.com/2019/07/25/asia/internet-undersea-cables-intl-hnk/index.html

https://www.telecomreview.com/articles/wholesale-and-capacity/6310-the-mission-of-landing-a-submarine-cable

https://www.extremetech.com/internet/231074-googles-faster-undersea-cable-goes-online-with-60-tbps-of-bandwidth

https://en.wikipedia.org/wiki/Refractive_index

48. How do fireflies glow?

https://www.scientificamerican.com/article/how-and-why-do-fireflies/

https://earthsky.org/earth/fireflies-light-up-why-how/

https://meadowia.com/what-eats-fireflies/

https://news.ncsu.edu/2019/07/how-fireflies-glow-and-what-signals-theyre-sending/

https://animals.howstuffworks.com/insects/question554.htm

https://en.wikipedia.org/wiki/Firefly

https://www.quantamagazine.org/how-do-fireflies-flash-in-sync-studies-suggest-a-new-answer-20220920/

49. How much space junk is there?

https://nanoavionics.com/blog/how-many-satellites-are-in-space/

https://www.ucsusa.org/resources/satellite-database

https://en.wikipedia.org/wiki/Space_debris

https://www.eurekalert.org/news-releases/922214

https://en.wikipedia.org/wiki/Whipple_shield

https://www.inmarsat.com/en/insights/corporate/2022/how-much-space-junk-is-there.html

https://www.nasa.gov/mission_pages/station/news/orbital_debris.html

https://www.nhm.ac.uk/discover/what-is-space-junk-and-why-is-it-a-problem.html

https://www.nasa.gov/audience/forstudents/9-12/features/F_What_Goes_Up_9-12.html

https://www.nasa.gov/mission_pages/station/news/orbital_debris.html

50. Why are flowers different colors?

https://www.loc.gov/everyday-mysteries/botany/item/what-causes-flowers-to-have-different-colors/

https://www.plantician.com/why-do-flowers-have-different-colors/

https://www.fs.usda.gov/wildflowers/pollinators/importance.shtml

https://letstalkscience.ca/educational-resources/backgrounders/plant-reproduction

https://schoolofbugs.com/can-insects-see-in-color-lets-find-out/

https://oxfordre.com/neuroscience/display/10.1093/acrefore/9780190264086.001.0001/acrefore-9780190264086-e-162

https://www.nwf.org/Garden-for-Wildlife/Wildlife/Attracting-Butterflies

https://www.ecrotek.com.au/blogs/articles/bee-friendly-blooms

https://sciencestruck.com/color-spectrum-chart

https://peecnature.org/why-do-flowers-have-color/

https://www.nytimes.com/2018/10/09/science/fruit-color-evolution.html

51. Why is there so much gold in Fort Knox?

https://www.usmint.gov/news/inside-the-mint/fort-knox-history

https://www.youtube.com/watch?v=GFfDnKVGIFU

https://www.garfieldrefining.com/resources/blog/does-fort-knox-still-have-gold/

https://en.wikipedia.org/wiki/United_States_Bullion_Depository

https://en.wikipedia.org/wiki/Gold_reserve

https://mybaseguide.com/installation/fort-knox/community/inside-fort-knox/

https://www.newyorkfed.org/aboutthefed/goldvault.html

52. Why are organ transplants so difficult?

https://www.giftofhope.org/which-organs-and-tissues-can-be-donated-after-death/

https://fortune.com/well/2023/02/15/3d-printed-organs-may-soon-be-a-reality/

https://my.clevelandclinic.org/health/drugs/10418-immunosuppressants

https://www.ncbi.nlm.nih.gov/books/NBK10770/

https://www.nyp.org/transplant/organ-donation/organ-transplant-process

https://www.organdonor.gov/learn/what-can-be-donated

https://www.medicalnewstoday.com/articles/325631#statistics

https://medlineplus.gov/ency/article/000815.htm

https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/organ-and-tissue-transplantation

https://en.wikipedia.org/wiki/Organ_transplantation

53. How would a cure for cancer work?

https://www.bbc.com/news/health-51182451

https://www.cancer.org/treatment/understanding-your-diagnosis/can-cancer-be-cured.html

https://moffitt.org/endeavor/archive/new-cure-for-cancer/

https://ec.europa.eu/research-and-innovation/en/horizon-magazine/will-we-ever-cure-cancer

https://www.cancer.gov/about-cancer/understanding/what-is-cancer

https://www.sciencefocus.com/the-human-body/what-happens-to-cells-in-our-bodies-when-they-die/

https://www.ncbi.nlm.nih.gov/books/NBK27104/

https://www.bmhsc.org/blog/your-immune-system-and-cancer-whats-the-connection

https://www.labiotech.eu/in-depth/cancer-treatments-immuno-oncology/

https://www.pennmedicine.org/news/news-releases/2018/october/blood-test-identifies-more-treatable-cancer-mutations-than-tissue-biopsy-alone

https://en.wikipedia.org/wiki/T_cell

54. What is a sponge?

https://www.inspiritvr.com/general-bio/invertebrates/sponges-study-guide

https://oceanservice.noaa.gov/facts/sponge.html

https://en.wikipedia.org/wiki/Sponge

https://en.wikipedia.org/wiki/Sponge_spicule

https://spongis.org/what-are-sponges/

https://www.newscientist.com/article/2296329-brainless-sponges-have-cells-that-might-be-the-precursors-of-neurons/

https://www.dfo-mpo.gc.ca/science/organization/sec-ces/atlantic-atlantique/blog/2018-10-17/index-eng.html

https://www.mrsd.org/cms/lib/NH01912397/Centricity/Domain/245/sponges%20reading.pdf

https://bio.libretexts.org/…/11.04%3A_Sponges

https://ec.europa.eu/research-and-innovation/en/horizon-magazine/cleaning-power-sea-sponges

https://www.fastcompany.com/90744494/microplastics-are-everywhere-these-sponges-could-help-capture-them

55. How is decaffeinated coffee made?

https://www.mpg.de/8365156/coffee-decaffeination-processes

https://www.ncausa.org/Decaffeinated-Coffee

https://www.nescafe.com/gb/understanding-coffee/coffee-beans/

https://en.wikipedia.org/wiki/Coffee_bean

https://www.nescafe.com/mena/en-ae/understanding-coffee/what-decaf-coffee

https://www.livescience.com/65278-how-decaf-coffee-is-made.html

https://www.scienceofcooking.com/caffeine-in-coffee-beans.html

https://elevencoffees.com/why-does-coffee-have-caffeine/

56. Why are hammerhead sharks shaped like that?

https://www.nationalgeographic.com/science/article/widely-set-eyes-give-hammerhead-sharks-exceptional-binocular-vision

https://en.wikipedia.org/wiki/Hammerhead_shark

https://en.wikipedia.org/wiki/Shark_finning

https://kids.nationalgeographic.com/animals/fish/facts/hammerhead-shark

https://theconversation.com/why-do-hammerhead-sharks-have-hammer-shaped-heads-184372

https://www.newscientist.com/article/dn18210-why-the-hammerhead-shark-got-its-hammer/

https://www.treehugger.com/why-hammerhead-sharks-have-such-funny-heads-4864027

http://news.bbc.co.uk/earth/hi/earth_news/newsid_8376000/8376740.stm

https://www.capeclasp.com/blogs/cape-clasp-blog/why-do-hammerhead-sharks-have-such-weird-shaped-heads

https://www.allthingsnature.org/what-is-a-hammerhead-shark.htm

https://www.eurekalert.org/news-releases/895626

57. How does a naval mine work?

https://en.wikipedia.org/wiki/Naval_mine

https://www.history.navy.mil/browse-by-topic/exploration-and-innovation/naval-mine-warfare.html

https://www.genevacall.org/news/naval-mines-and-international-humanitarian-law/

58. How did the Vatican become a country?

https://en.wikipedia.org/wiki/Old_St._Peter%27s_Basilica

https://en.wikipedia.org/wiki/Lateran_Treaty

https://en.wikipedia.org/wiki/Lateran_Palace

https://en.wikipedia.org/wiki/History_of_the_papacy

https://www.thevaticantickets.com/vatican-history/

https://en.wikipedia.org/wiki/Vatican_City

https://www.history.com/topics/religion/vatican-city

https://seanmcdowell.org/blog/was-peter-crucified-upside-down

59. What is high fructose corn syrup?

https://www.goodrx.com/well-being/diet-nutrition/carbs-and-blood-sugar

https://kitchencuddle.com/how-is-cornstarch-made/

https://en.wikipedia.org/wiki/High-fructose_corn_syrup

https://www.healthline.com/nutrition/why-high-fructose-corn-syrup-is-bad#6.-Contains-no-essential-nutrients

https://www.webmd.com/diet/what-to-know-about-high-fructose-corn-syrup

https://www.fda.gov/food/food-additives-petitions/high-fructose-corn-syrup-questions-and-answers

http://www.madehow.com/Volume-4/Corn-Syrup.html

https://www.liftglucose.com/what-is-the-difference-between-glucose-dextrose/

https://access-ci.org/under-pressure-heat-doesnt-always-move-faster/

https://www.delightedcooking.com/what-is-the-difference-between-dextrose-fructose-and-glucose.htm

https://www.hartfordhospital.org/about-hh/news-center/news-detail?articleId=27851&publicid=461

60. What is the difference between short and long-term memory?

https://www.verywellmind.com/what-is-short-term-memory-2795348

https://vistapineshealth.com/memory/

https://en.wikipedia.org/wiki/Short-term_memory

https://en.wikipedia.org/wiki/Sensory_memory

https://www.memorylosstest.com/short-term-memory-definition-long-term-memory/

https://www.frontiersin.org/articles/10.3389/fphar.2017.00438/full

https://news.mit.edu/2017/neuroscientists-identify-brain-circuit-necessary-memory-formation-0406

https://southtree.com/blogs/artifact/where-are-memories-stored

https://qbi.uq.edu.au/brain-basics/memory/where-are-memories-stored

61. Are all bones made of calcium?

https://askabiologist.asu.edu/bone-anatomy

https://www.discovery.com/science/force-to-break-bone

https://en.wikipedia.org/wiki/Bone

https://www.bones.nih.gov/health-info/bone/bone-health/what-is-bone

https://askabiologist.asu.edu/human-bird-and-bat-bone-comparison

https://www.sciencedaily.com/releases/2010/03/100322112103.htm

https://www.pheasant.com/resources/avian-skeletal-system

https://birdfact.com/articles/do-birds-have-hollow-bones

https://byjus.com/biology/fish-skeletal-system/

https://nerdfighteria.info/v/U4b-Mv_3e4U/

https://www.blueplanetaquarium.com/fish-stories/cartilaginous-fish-vs-bony-fish-differences-between-them/

https://www.thoughtco.com/what-is-a-cartilaginous-fish-2291875

62. Why can blowing up a balloon make you pass out?

https://en.wiktionary.org/wiki/syncope

https://www.reddit.com/r/explainlikeimfive/comments/132v6i/eli5_when_i_try_to_blow_up_a_balloon_or_air/

https://www.msdmanuals.com/en-jp/home/hormonal-and-metabolic-disorders/acid-base-balance/overview-of-acid-base-balance

https://www.healthpartners.com/blog/what-happens-to-your-body-when-you-faint/

https://en.wikipedia.org/wiki/Syncope_(medicine)

https://my.clevelandclinic.org/health/symptoms/21699-fainting

https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/fainting

https://my.clevelandclinic.org/health/diseases/21657-respiratory-alkalosis

https://www.bhf.org.uk/research-projects/does-redox-state-of-pkg1-control-hypoxic-vasoconstriction-and-remodelling-in-the-pulmonary-vasculature

https://www.ctvnews.ca/health/fainting-on-the-toilet-is-a-real-medical-problem-but-doctors-say-it-can-be-avoided-1.3895702?cache=yes%231.813087

63. What is an anchorite?

https://www.bl.uk/medieval-literature/articles/the-life-of-the-anchoress

https://www.thecollector.com/medieval-anchorites-immured-walled-up-alive/

https://www.buildingconservation.com/articles/anchorites/anchorites.htm

https://citydesert.wordpress.com/2014/01/03/extreme-hermits-the-anchorites/

https://en.wikipedia.org/wiki/Anchorite

https://solitudes.qmul.ac.uk/blog/sociable-solitude-in-the-medieval-anchorhold/

64. What is the Jevons Paradox?

https://www.newyorker.com/magazine/2010/12/20/the-efficiency-dilemma

https://www.resilience.org/stories/2020-06-17/jevons-paradox/

https://simplicable.com/economics/jevons-paradox

https://en.wikipedia.org/wiki/William_Stanley_Jevons

https://en.wikipedia.org/wiki/Jevons_paradox

65. Why does beer have alcohol?

https://www.sciencedaily.com/releases/2019/01/190107112950.htm

https://en.wikipedia.org/wiki/Brewing

https://www.biocompare.com/Life-Science-News/357370-Why-Does-Yeast-Produce-Ethanol/

https://www.nature.com/scitable/topicpage/yeast-fermentation-and-the-making-of-beer-14372813/

http://www.botany.hawaii.edu/faculty/wong/BOT135/Lect14.htm

https://www.thespruceeats.com/basic-yeast-information-304312

66. Who owns the North Pole and the South Pole?

https://blogs.loc.gov/maps/2021/09/reaching-the-south-pole-during-the-heroic-age-of-exploration

https://www.smithsonianmag.com/history/who-discovered-the-north-pole-116633746/

https://en.wikipedia.org/wiki/Territorial_claims_in_the_Arctic

https://www.narcity.com/who-owns-the-north-pole-canada-russia-and-denmark-are-claiming-it-as-their-own

https://gisgeography.com/magnetic-north-vs-geographic-true-pole/

https://en.wikipedia.org/wiki/Territorial_claims_in_Antarctica

https://www.antarctica.gov.au/about-antarctica/people-in-antarctica/who-owns-antarctica/

https://www.auroraexpeditions.com.au/blog/who-owns-antarctica/

https://www.wtamu.edu/~cbaird/sq/2013/11/15/why-does-a-magnetic-compass-point-to-the-geographic-north-pole/

67. What happens in your brain when you learn a second language?

https://bmcbiol.biomedcentral.com/articles/10.1186/s12915-017-0405-3

https://memory.ucsf.edu/symptoms/speech-language

https://www.hopkinsmedicine.org/news/media/releases/brocas_area_is_the_brains_scriptwriter_shaping_speech_study_finds

https://www.discovermagazine.com/mind/how-learning-a-language-changes-your-brain

https://medium.com/age-of-awareness/5-fascinating-things-that-happen-to-your-brain-when-you-learn-another-language-2f075fad8f45

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5845836/

https://www.cambridge.org/elt/blog/2022/04/29/learning-language-changes-your-brain/

https://dana.org/article/how-does-the-brain-learn-language/

https://en.wikipedia.org/wiki/Anterior_cingulate_cortex

https://neurosciencecommunity.nature.com/posts/15138-learning-a-second-language-remodels-our-brains

https://resources.unbabel.com/blog/brain-language-learning

https://www.sciencefocus.com/the-human-body/what-happens-in-our-brain-when-we-learn-languages/

68. Why don’t we move when we’re dreaming?

https://www.sleepfoundation.org/how-sleep-works/sleep-spindles

https://www.healthline.com/health/healthy-sleep/stages-of-sleep

https://www.verywellmind.com/what-are-delta-waves-2795104

https://www.sleepfoundation.org/stages-of-sleep/rem-sleep

https://www.ncbi.nlm.nih.gov/books/NBK526132/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5887131/

https://thebrain.mcgill.ca/flash/i/i_11/i_11_cl/i_11_cl_cyc/i_11_cl_cyc.html

https://www.physio-pedia.com/Motor_Neurone

https://www.nbcnews.com/health/body-odd/heres-what-paralyzes-you-during-sleep-flna891013

https://en.wikipedia.org/wiki/Rapid_eye_movement_sleep

https://www.sciencedaily.com/releases/2012/07/120711131030.htm

https://www.utoronto.ca/news/how-sleep-paralysis-works

69. What is the oldest stone circle in the world?

https://astronomy.com/news/2020/06/nabta-playa-the-worlds-first-astronomical-site-was-built-in-africa-and-is-older-than-stonehenge

https://en.wikipedia.org/wiki/G%C3%B6bekli_Tepe

https://archive.archaeology.org/0811/abstracts/turkey.html

https://www.crystalinks.com/gobekli_tepe.html

https://ecohustler.com/culture/10-things-you-didnt-know-about-stone-circles

70. How small is nanotechnology?

https://www.youtube.com/watch?v=huKUJsqik2I&t=141s

https://www.news-medical.net/life-sciences/Properties-of-Nanoparticles.aspx

https://education.nationalgeographic.org/resource/nanotechnology/

https://www.nano.gov/nanotech-101/what/nano-size

https://www.nano.gov/about-nanotechnology/working-at-nanoscale

https://www.twi-global.com/technical-knowledge/faqs/what-are-nanoparticles

https://ec.europa.eu/health/scientific_committees/opinions_layman/en/nanotechnologies/l-2/3-nanoparticle-properties.htm

https://www.azonano.com/article.aspx?ArticleID=1134

71. What is the difference between carnivores, herbivores, and omnivores?

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4866192/

https://letstalkscience.ca/educational-resources/backgrounders/how-animals-digest-their-food

https://www.vedantu.com/question-answer/differentiate-between-herbivores-carnivores-and-class-10-biology-cbse-5f8c832a6068042cbfc33332

https://kidskonnect.com/animals/herbivores-carnivores-and-omnivores/

https://www.reddit.com/r/explainlikeimfive/comments/290lah/eli5why_do_carnivores_stay_healthy_from_just/

https://www.toppr.com/ask/question/the-liver-of-carnivore-is-larger-than-the-herbivorebecause-in-carnivores/

https://www.forbes.com/sites/quora/2016/12/23/how-humans-evolved-to-be-natural-omnivores/?sh=14f99c047af5

72. What makes our joints pop and click?

https://www.ncbi.nlm.nih.gov/books/NBK279363/

https://en.wikipedia.org/wiki/Joint

https://www.youtube.com/watch?v=D3GVKjeY1FM

https://www.loc.gov/everyday-mysteries/biology-and-human-anatomy/item/what-causes-the-noise-when-you-crack-a-joint/

https://www.pinnacle-ortho.com/why-are-my-joints-cracking-all-of-a-sudden

https://en.wikipedia.org/wiki/Synovial_fluid

https://health.clevelandclinic.org/snap-crackle-pop-need-know-joint-noises/

https://en.wikipedia.org/wiki/Cavitation

73. Where is the source of the Nile?

https://en.wikipedia.org/wiki/Nile

https://www.discovermagazine.com/planet-earth/the-source-of-the-nile-river-a-mystery-that-spanned-three-millennia

https://en.wikipedia.org/wiki/Kagera_River

https://education.nationalgeographic.org/resource/nile-river/

https://www.triptrivia.com/the-nile-vs-the-amazon-which-river-is-the-longest/XphLiNfEsAAGy_a2

https://geographical.co.uk/science-environment/the-unsettling-sources-of-the-nile

https://www.newworldencyclopedia.org/entry/Blue_Nile

https://beyonder.travel/africa/source-of-the-river-nile-a-mystery/

https://www.witpress.com/elibrary/wit-transactions-on-ecology-and-the-environment/153/22906

https://landioustravel.com/egypt/geography-egypt/nile-delta/

74. Why is a strike called a “strike”?

https://jacobin.com/2018/05/strikes-history-london-sailors-coal-heavers

https://nvdatabase.swarthmore.edu/content/egyptian-laborers-strike-pay-1170-bce

https://en.wikipedia.org/wiki/Strike_action

http://dermotfeenan.com/index.php/2018/05/07/on-strike-commemorating-the-250th-anniversary-of-the-word-strike/

https://www.worldhistory.org/article/1089/the-first-labor-strike-in-history/

https://www.history.com/news/decline-ancient-egypt-causes

75. How does a speedometer work?

https://protectmycar.com/blog/how-speedometer-work

https://www.howacarworks.com/accessories/how-a-speedo-works

https://www.explainthatstuff.com/how-speedometer-works.html

https://theproctordealerships.com/speedometer-stopped-working-speedometers-work-causes-stop-working/

https://www.artofmanliness.com/skills/manly-know-how/gearhead-101-the-drivetrain/

https://www.artofmanliness.com/skills/manly-know-how/gearhead-101-understanding-manual-transmission/

https://itstillruns.com/parts-speedometer-7298092.html

76. Could Earth survive without the moon?

https://oceanservice.noaa.gov/education/tutorial_tides/tides03_gravity.html

https://www.jagranjosh.com/general-knowledge/what-is-tides-why-it-occurs-and-how-it-is-important-for-human-life-1506511282-1

https://wasp-planets.net/2018/12/30/solar-system-planet-tilts/

https://www.rmg.co.uk/stories/topics/what-would-happen-if-moon-disappeared

https://www.iop.org/explore-physics/moon/how-does-moon-affect-earth#gref

https://en.wikipedia.org/wiki/Axial_tilt

https://www.forbes.com/sites/startswithabang/2017/03/02/7-ways-earth-would-change-if-our-moon-were-destroyed/?sh=56c132138527

https://www.discoverwildlife.com/animal-facts/ways-moon-affects-wildlife/

https://nineplanets.org/questions/what-would-happen-if-there-was-no-moon/

77. Where did Jazz come from?

https://www.allaboutjazz.com/a-brief-history-of-the-blues-by-ed-kopp

https://www.loc.gov/item/ihas.200035811/

https://www.vermontpublic.org/programs/2016-08-01/timeline-blues-ragtime-and-jazz

https://www.allaboutbluesmusic.com/the-origins-of-blues-music/

https://www.neworleans.com/things-to-do/music/history-and-traditions/birthplace-of-jazz/

https://en.wikipedia.org/wiki/Congo_Square

https://www.bbc.com/travel/article/20120224-travelwise-the-birthplace-of-jazz

https://en.wikipedia.org/wiki/Jazz

https://americanhistory.si.edu/smithsonian-jazz/education/what-jazz

https://erlc.com/resource-library/articles/a-brief-timeline-of-when-slavery-ended-in-the-united-states/

https://blogs.loc.gov/folklife/2017/02/birth-of-blues-and-jazz/

78. How is sewage treated?

https://www3.epa.gov/npdes/pubs/bastre.pdf

https://en.wikipedia.org/wiki/Sewage_treatment

https://www.thameswater.co.uk/about-us/responsibility/education/the-sewage-treatment-process

https://www.wearewater.org/en/sewage-the-trace-of-our-history_281141

https://www.un.org/sustainabledevelopment/water-and-sanitation/

79. How do pythons kill their prey?

https://www.sjsu.edu/serc/docs/snakes-curriculum/Lesson%202%20-%20Digestive%20System-1.pdf

https://www.nationalgeographic.com/animals/article/150722-boa-constrictors-snakes-animals-science-kill

https://www.ck12.org/book/ck-12-biology-advanced-concepts/section/16.27/

https://www.scientificamerican.com/article/snakes-flexible-heat-sensing-organs-explained/

https://sdzwildlifeexplorers.org/animals/python

https://en.wikipedia.org/wiki/Pythonidae

https://a-z-animals.com/blog/boa-vs-python/

https://thewire.in/environment/how-do-snake-constrictors-kill-their-prey

80. How is an addict’s brain different to a non-addict’s?

https://www.yalemedicine.org/news/how-an-addicted-brain-works

https://www.youtube.com/watch?v=RZ5LH634W8s

https://iuhealth.org/thrive/is-addiction-really-a-disease

https://blogs.scientificamerican.com/observations/what-does-it-mean-when-we-call-addiction-a-brain-disorder/

https://drugfree.org/article/is-addiction-a-disease/

https://www.npr.org/sections/health-shots/2012/02/03/146307907/addicts-brains-may-be-wired-at-birth-for-less-self-control

https://www.aana.com/docs/default-source/wellness-aana.com-web-documents-(all)/how-do-addicted-brains-differ-from-nonaddicted-brains.pdf?sfvrsn=252c4bb1_2

https://www.recoveryanswers.org/recovery-101/brain-in-recovery/

https://en.wikipedia.org/wiki/Nucleus_accumbens

https://www.addictionsandrecovery.org/is-addiction-a-disease.htm

https://nida.nih.gov/publications/drugfacts/genetics-epigenetics-addiction

https://www.webmd.com/mental-health/what-is-dopamine

https://www.pnas.org/post/journal-club/several-brain-regions-help-us-anticipate-whats-going-to-happen-next

81. What is the difference between a crocodile and an alligator?

https://www.sciencedaily.com/releases/2012/03/120316093427.htm

https://a-z-animals.com/blog/alligator-vs-crocodile-key-differences/

https://en.wikipedia.org/wiki/Crocodilia

https://en.wikipedia.org/wiki/Crocodile

https://en.wikipedia.org/wiki/Alligator

https://www.everythingreptiles.com/alligator-vs-crocodile/

https://www.nature.com/articles/s41598-018-24579-6

https://www.britannica.com/story/whats-the-difference-between-alligators-and-crocodiles

https://www.captainjacksairboattours.com/2-whats-the-difference-between-alligators-and-crocodiles/

http://www.iucncsg.org/pages/Temperature-Regulation.html

https://www.nytimes.com/2018/03/12/science/alligators-crocodiles-differences.html

https://www.diffen.com/difference/Alligator_vs_Crocodile

82. How high can a plane and a helicopter fly?

https://www.quora.com/Why-cant-helicopters-fly-at-high-altitudes-thin-air

https://flexbooks.ck12.org/cbook/ck-12-middle-school-earth-science-flexbook-2.0/section/10.3/primary/lesson/pressure-and-density-of-the-atmosphere-ms-es/

https://science.howstuffworks.com/transport/flight/modern/airplanes3.htm

https://science.howstuffworks.com/transport/flight/modern/helicopter6.htm

https://www.grc.nasa.gov/www/k-12/UEET/StudentSite/dynamicsofflight.html

https://www.smithsonianmag.com/air-space-magazine/who-holds-the-altitude-record-for-an-airplane-141522931/

https://www.reddit.com/r/explainlikeimfive/comments/tcxdkx/eli5_why_can_a_u2_spy_plane_fly_higher_than_a_747/

https://monroeaerospace.com/blog/how-high-can-airplanes-really-fly/

https://www.virginexperiencedays.co.uk/experience-blog/how-high-can-a-helicopter-fly

83. Why are some animals cold-blooded?

https://tpwd.texas.gov/publications/nonpwdpubs/young_naturalist/animals/warm_and_cold_blooded_animals/

https://www.washingtonpost.com/lifestyle/kidspost/ever-wondered-about-warm-blooded-and-cold-blooded-animals/2015/11/27/575d30ca-6c57-11e5-aa5b-f78a98956699_story.html

https://www.unm.edu/~lkravitz/Article%20folder/thermoregulation.html

https://www.sciencedaily.com/releases/2019/06/190604172659.htm

https://journeynorth.org/tm/monarch/ColdBlooded.html

https://zooatlanta.org/cold-blooded-whats-it-mean/

https://jakesnatureblog.com/2018/06/30/3-advantages-of-cold-blooded-animals/

84. Why do cars only have five gears?

https://askcarmechanic.com/is-cvt-more-efficient-than-manual-transmission/

https://www.carfax.com/blog/cvt-pros-and-cons

https://www.caranddriver.com/research/a30822055/what-is-a-cvt-transmission/

https://www.team-bhp.com/news/explained-6th-gear-needed-and-all-about-gear-ratios

https://jalopnik.com/i-have-determined-the-correct-amount-of-gears-1823891054

https://energyeducation.ca/encyclopedia/Gear

https://learndriving.tips/learning-to-drive/how-to-change-gear-in-manual-car/why-are-gears-used-in-cars/

https://www.acko.com/car-guide/car-gear-box/

https://en.wikipedia.org/wiki/Manual_transmission

https://mechanics.stackexchange.com/questions/58588/why-do-vehicles-not-have-more-gears

https://www.autoguru.com.au/car-advice/articles/why-do-some-cars-have-more-gears-than-others

https://www.reddit.com/r/explainlikeimfive/comments/4j0xgj/eli5_why_some_cars_have_5_gears_and_other_have_6/

https://www.roadandtrack.com/new-cars/car-technology/a12019034/why-dont-electric-cars-have-multi-gear-transmissions/

85. What causes muscle cramps?

https://www.bbc.com/future/article/20120430-are-cramps-due-to-lack-of-salt

https://courses.lumenlearning.com/wm-biology2/chapter/neural-stimulation-of-muscle-contraction/

https://www.drinkhydrant.com/blogs/news/does-dehydration-cause-leg-cramps

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6407543/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6901412/

https://www.bupa.co.uk/health-information/exercise-fitness/exercise-muscle-cramps

https://en.wikipedia.org/wiki/Cramp

https://justaddbuoy.com/blogs/hydration-station/the-link-between-dehydration-electrolyte-imbalance-and-muscle-cramps

https://my.clevelandclinic.org/health/symptoms/21190-muscle-cramps

https://www.health.harvard.edu/staying-healthy/take-that-muscle-cramps

https://my.clevelandclinic.org/health/body/23123-peripheral-nervous-system-pns

https://my.clevelandclinic.org/health/diseases/15466-muscle-spasms

86. Can a tortoise live without its shell?

https://factsking.com/animal-facts/tortoises-predators/

https://www.tortoiseowner.com/can-tortoises-turtles-live-without-their-shell/

https://www.nashvillezoo.org/our-blog/posts/turtles-vs-tortoises

https://en.wikipedia.org/wiki/Turtle_shell

https://en.wikipedia.org/wiki/Turtle

https://en.wikipedia.org/wiki/Tortoise

https://animals.howstuffworks.com/reptiles/turtle-shell.htm

https://www.tortoiseknowledge.com/why-do-tortoises-hide-in-their-shells/

https://animals.mom.com/tortoises-retract-heads-6140.html

87. How does animal camouflage work?

https://www.newscientist.com/lastword/mg25033370-800-why-are-there-no-green-mammals/

https://www.livescience.com/why-are-tigers-orange

https://animals.howstuffworks.com/animal-facts/animal-camouflage.htm

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2674078/

https://www.nhm.ac.uk/discover/can-you-spot-hidden-animals-cunning-camouflage.html

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2674079/

https://news.mongabay.com/2016/02/scientists-see-like-predators-to-prove-camouflage-works/

https://education.nationalgeographic.org/resource/camouflage/

https://www.bbc.com/future/article/20191031-the-truth-behind-why-zebras-have-stripes

88. What are runes?

https://courses.lumenlearning.com/atd-herkimer-westerncivilization/chapter/the-germanic-tribes/

https://www.vox.com/world/2018/6/19/17469176/roman-empire-maps-history-explained

https://en.wikipedia.org/wiki/Proto-Germanic_language

https://upload.wikimedia.org/wikipedia/commons/0/0b/Europe_and_the_Near_East_at_476_AD.png

https://chem.libretexts.org/Courses/Lumen_Learning/Book%3A_Western_Civilization_I_(Lumen)/11%3A_Week_9%3A_Christianity_and_the_Late_Roman_Empire/11.5%3A_Reading%3A_The_Germanic_Tribes

https://en.wikipedia.org/wiki/Runes

https://en.wikipedia.org/wiki/Elder_Futhark

https://en.wikipedia.org/wiki/Younger_Futhark

https://www.twinkl.jp/teaching-wiki/runes

https://www.vikingeskibsmuseet.dk/en/professions/education/viking-age-people/runes

https://margaliti.com/members/lect4eng2014.pdf

https://www.lifeinnorway.net/viking-runes/

89. Where was the first artificial dam?

https://en.wikipedia.org/wiki/Dam

https://en.wikipedia.org/wiki/Dholavira

https://en.wikipedia.org/wiki/Jawa,_Jordan

https://tataandhoward.com/a-history-of-dams-from-ancient-times-to-today/

https://education.nationalgeographic.org/resource/dams/

https://www.downtoearth.org.in/indepth/secrets-of-the-water-fort-31932

https://sethna.lassp.cornell.edu/SimScience/cracks/intermediate/grav_hist1.html

http://boulderlibrary.net/water-engineering-in-ancient-civilizations-5-000-years-of-history/romans-and-dam-technology.html

https://en.wikipedia.org/wiki/Arch_dam

90. How does a joint replacement work?

https://my.clevelandclinic.org/health/body/23173-cartilage

https://www.webmd.com/healthy-aging/features/joints-change-age

https://www.raleighsportsmed.com/cartilage-replacement-dr-barker-orthopaedic-surgeon-cary-garner-nc.html

https://orthoinfo.aaos.org/en/treatment/total-knee-replacement-animation/

https://orthoinfo.aaos.org/en/treatment/total-joint-replacement/

https://www.webmd.com/osteoarthritis/features/joint-replacement-risks-benefits

https://www.mayoclinic.org/tests-procedures/knee-replacement/about/pac-20385276

https://www.uofmhealth.org/conditions-treatments/cmc/total-joint-replacement

https://www.scientificamerican.com/article/your-body-may-be-able-to-repair-its-arthritic-joints-with-help-from-drugs-or-surgery/

91. How big and how small can a mammal be?

http://manghammath.com/Chapter%20Packets/Animals%20Day%202.pdf

https://www.tutorialspoint.com/p-why-does-heat-transfer-from-a-hot-body-to-a-cold-body-p

https://www.smithsonianmag.com/science-nature/why-king-kong-should-have-been-blue-whale-180962603/

https://www.discoverwildlife.com/animal-facts/how-big-or-small-could-animals-get/

https://www.snexplores.org/article/monstrous-mammals-would-break-the-body-rules

https://en.wikipedia.org/wiki/Blue_whale

https://www.smithsonianmag.com/smart-news/biggest-not-bigger-how-whales-ballooned-size-and-stayed-there-180973780/

https://www.amnh.org/content/download/322380/4992437/file/giants-of-the-sea-student-essay_1%20(2).pdf

92. Why is Las Vegas in the desert?

https://en.wikipedia.org/wiki/Los_Angeles_and_Salt_Lake_Railroad

https://teachnthrive.com/history-passages/u-s-passages/why-was-las-vegas-built-on-a-desert/

https://en.wikipedia.org/wiki/Las_Vegas

https://en.wikipedia.org/wiki/History_of_Las_Vegas

https://theculturetrip.com/north-america/usa/nevada/articles/a-brief-history-of-las-vegas-as-we-know-it-today/

https://www.american-rails.com/history.html

https://www.ktnv.com/positivelylv/northern-nevada-railway-how-railroads-helped-build-nevada

93. What is the difference between a forest, a wood, and a copse?

https://www.growingwithnature.org/what-is-coppicing/

https://www.thefreedictionary.com/copse

https://www.etymonline.com/word/copse

https://en.wikipedia.org/wiki/Coppicing

https://ourworldindata.org/world-lost-one-third-forests

https://en.wikipedia.org/wiki/Forest

http://www.differencebetween.net/language/differences-between-woods-and-forest/

https://web.archive.org/web/20141129030802/http://www.broadland.gov.uk/PDF/Broadsheet_093_-_April_2011_%283%29.pdf

https://www.etymonline.com/word/forest

94. Why do we lose our voice when we are sick?

https://www.macmillan.org.uk/cancer-information-and-support/laryngeal-larynx-cancer/the-larynx

https://www.ncbi.nlm.nih.gov/books/NBK534630/

https://en.wikipedia.org/wiki/Inflammation

https://my.clevelandclinic.org/health/symptoms/21660-inflammation

https://askabiologist.asu.edu/questions/how-viruses-work

https://ilearnedthistoday.com/index.php/2022/11/20/how-do-throat-lozenges-work/

https://www.chesapeakebayent.com/resources-and-information/lost-voice-from-cold

https://www.webmd.com/cold-and-flu/what-is-laryngitis

https://utswmed.org/medblog/cold-flu-allergy-hurt-your-voice/

https://www.houstonmethodist.org/blog/articles/2020/feb/5-reasons-for-losing-your-voice-and-tips-for-getting-it-back/

https://www.templehealth.org/about/blog/how-does-my-voice-work

95. Why does the house always win in a casino?

https://www.prairiestategaming.com/blog/history-of-casino-gaming

https://www.encyclopedia.com/reference/social-sciences-magazines/gambling-united-states-overview

https://www.lasvegasadvisor.com/question/first-casino-and-meaning-of-the-word/

https://worldfinancialreview.com/short-history-of-casinos/

https://en.wikipedia.org/wiki/Casino

https://www.vocabulary.com/dictionary/casino

https://golfnews.co.uk/other-news/the-psychology-of-casino-design-how-casinos-keep-you-playing/

https://www.investopedia.com/articles/personal-finance/110415/why-does-house-always-win-look-casino-profitability.asp

https://edge.twinspires.com/casino-news/what-is-the-house-edge-in-roulette-and-why-is-it-important/

https://wizardofodds.com/games/roulette/basics/

https://www.casino.org/roulette/odds/

https://www.gatewayfoundation.org/addiction-blog/casino-psychology/

96. How can we catch a ball without looking at it?

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7329307/

https://elifesciences.org/articles/85301

https://www.webmd.com/brain/vestibular-disorders-facts

https://www.webmd.com/brain/what-is-proprioception

https://www.yourtherapysource.com/blog1/2017/02/27/brain-activation-ball-skills/

https://www.reddit.com/r/explainlikeimfive/comments/5gilyh/eli5_how_is_it_possible_to_catch_a_ball_without/

https://www.psychologytoday.com/us/blog/the-science-imagination/201709/how-we-can-catch-ball-when-we-dont-know-where-it-will-be

https://magazine.scienceconnected.org/2015/05/biologist-explains-how-we-learn-to-catch/

https://en.wikipedia.org/wiki/Proprioception

https://www.upi.com/Archives/1983/01/28/The-physics-of-judging-a-fly-ball/2171412578000/

https://www.wired.com/story/how-do-people-actually-catch-baseballs/

https://science.nasa.gov/science-news/science-at-nasa/2002/18mar_playingcatch

https://www.sciencedaily.com/releases/2022/03/220325185902.htm

97. What was the last Apollo mission?

https://www.britannica.com/explore/space/after-apollo-what/

https://www.historycentral.com/sixty/Economics/Overview.html

https://www.planetary.org/space-policy/cost-of-apollo

https://www.jfklibrary.org/visit-museum/exhibits/past-exhibits/moon-shot-jfk-and-space-exploration

https://www.popsci.com/blog-network/vintage-space/what-happened-apollos-2-and-3/

https://www.nasa.gov/specials/60counting/begin.html

https://airandspace.si.edu/stories/editorial/why-did-we-stop-going-moon

https://en.wikipedia.org/wiki/Apollo_program

https://en.wikipedia.org/wiki/Apollo_17

https://www.rmg.co.uk/stories/topics/why-did-we-stop-going-moon

98. Why was the Hoover Dam so difficult to build?

https://www.linkedin.com/pulse/why-concrete-temperature-important-especially-during-extremes-canute/

https://californiacustomcoatings.com/pouring-the-concrete-in-hoover-dam/

https://www.airsupplyinclv.com/how-did-a-concrete-cooling-system-help-build-hoover-dam-is-concrete-still-curing/

https://delzottoproducts.com/2017/03/15/long-will-take-concrete-hoover-dam-cure/

https://www.usbr.gov/lc/phoenix/AZ100/1930/hoover_dam.html

https://en.wikipedia.org/wiki/Hoover_Dam

https://time.com/4045046/hoover-dam-name-history/

https://www.nps.gov/articles/-the-greatest-dam-in-the-world-building-hoover-dam-teaching-with-historic-places.htm

99. Why do crabs walk sideways?

https://www.iflscience.com/why-does-evolution-keep-turning-everything-into-crabs-58459

https://www.reference.com/pets-animals/crabs-brains-8884f4b974c962fb

https://oceanexplorer.noaa.gov/explorations/02alaska/logs/jun27/jun27.html

https://en.wikipedia.org/wiki/Carcinisation

https://en.wikipedia.org/wiki/Crab

https://www.sciencefocus.com/nature/why-do-crabs-walk-sideways/

https://www.discoverwildlife.com/animal-facts/marine-animals/why-do-crabs-walk-sideways/

https://www.tampabay.com/archive/1994/12/20/why-do-crabs-walk-sideways/

https://www.popularmechanics.com/science/animals/a42235392/crab-evolution-carcinization-explained/

100. What is a marsh and a swamp?

https://education.nationalgeographic.org/resource/marsh/

https://en.wikipedia.org/wiki/Marsh

https://www.quora.com/Why-can-some-trees-grow-successfully-in-a-swamp-and-others-cannot

https://education.nationalgeographic.org/resource/swamp/

https://www.reconnectwithnature.org/news-events/the-buzz/what-the-difference-marsh-vs-swamp-vs-wetland/

https://en.wikipedia.org/wiki/Swamp

https://oceanservice.noaa.gov/facts/mangroves.html

101. When did oxygen appear on Earth?

NOAA – JetStream: Atmosphere
Tassomai – Earth’s Early Atmosphere
National Geographic – Formation of Earth
MIT – First Appearance of Oxygen
AMNH – Rise of Oxygen: Microbes
AMNH – Earth Without Oxygen
ASM – Great Oxidation Event
SciJinks – Atmosphere Formation
Wikipedia – Great Oxidation Event

102. How long did it take for the sun to get hot?

Wikipedia – Sun
Wikipedia – Solar System Formation
StackExchange – Sun Formation
Universe Today – Life of the Sun
Highline College – Solar System Notes
Wikipedia – Protostar
NOAA – Space Weather PDF
Space.com – Sun Formation
The Science Breaker – Turning on the Lights
ScienceAlert – Why Isn’t Jupiter a Star?
ScienceAlert – Smallest Star

103. How do people predict the weather?

NOAA – Forecast Office Virtual Tour
Wonderopolis – Forecasting Weather
BBC – Weather Forecasting Explained
Met Office – How Forecasts Are Made
Wikipedia – Fluid Dynamics
IBM – Weather Forecasting Guide
Forbes – Data Points in Forecasting
Wikipedia – Weather Forecasting

104. Why is lead poisonous?

Thurston PUD – Lead in Water
Safe Piping Matters – Lead Piping
Wikipedia – Lead
NIEHS – Lead
The Conversation – Dangers of Lead
WHO – Lead Poisoning
Wikipedia – Lead Poisoning
Sandberg – Lead in Paint
Williams Painting – Lead Paint
NRDC – Lead in Water
Lead Safe Manchester
NCBI – Lead Poisoning Review

105. How can an eagle see so far?

Wondrium – How Eyes Work
BBC – Limits of Human Vision
Vision Center – Fovea
HowStuffWorks – Eagle Vision
AnimalWised – How Eagles Hunt
Live Science – Human Eye
AnimalsFYI – Eagle Eyes
Insight Vision Center – Eagle Vision
Journey North – Eagle Vision Part 1

106. Why do cameras have mirrors?

Wikipedia – Pinhole Camera
BYJU’S – Pinhole Image Inversion
CreativeLive – How Cameras Work
BC Eye – Retinal Image Inversion
Medium – DSLR vs. Mirrorless
What Digital Camera – Reflex Mirror
Scientific American – Right-Side-Up Images
Wikipedia – Camera Obscura

107. Why can a peregrine falcon fly so fast?

Marathon Handbook – Cheetah Speed
FAI – Speed Skydiving
HowStuffWorks – Peregrine Falcon Speed
Audubon – Deadly Falcons
Audubon – Peregrine Falcon
BU – Biolocomotion Blog
Wildlife Sustainable Lifestyle – Peregrines
Wikipedia – Peregrine Falcon
YouTube – Peregrine Dive
Quora – Falcon Dive G-force

108. How does a breathalyzer work?

NHTSA – Drunk Driving
History.IN – Drunkometer
Medical News Today – Breathalyzer
McGill OSS – BAC Misconceptions
Alcopro – Alcohol in Breath
Wikipedia – Henry’s Law
HG.org – DUI Breath Testing
NIDirect – Alcohol Effects
NHS – Alcohol Units
McGill OSS – Breathalyzer History
HowStuffWorks – Breathalyzer

109. When did people start eating chickens?

Wikipedia – Chicken as Food
Dawn Farm – Chicken Prices
Secrets of the Eastern Shore – Cecile Steele
Cluckin.net – Poultry Costs
NY Times – Chicken History
Wisconsin Extension – Chicken Origins
Pitco – Chicken Popularity

110. Why do we say eleven and twelve, and first, second and third?

Sporcle – Eleven and Twelve
Mental Floss – Number Origins
World Wide Words – First and Second
Word Detective – Ordinals
Mashed Radish – Hundred

111. How does an ion thruster work?

Phys.org – Ion Propulsion
GlobalSpec – How Ion Thrusters Work
NASA – Glenn Research Center
Wikipedia – Ion Thruster
The Space Techie – Ion Thrusters
Northwestern – What is an Ion?
LibreTexts – Atomic Properties
ESA – Ion Drives
Stack Exchange – Ion Engine Speed

112. Why does bread need yeast?

Crafty Baking – Yeast in Baking
The Spruce Eats – Yeast Info
The Kitchn – Science of Yeast
Wikipedia – Yeast
Science Daily – Yeast Research
Exploratorium – Bread Science
Allagash – Yeast in Beer
Oculyze – Yeast After Fermentation

113. What is Munchausen Syndrome by Proxy?

Wikipedia – Factitious Disorder
NHS Inform – Munchausen’s Syndrome
MedlinePlus – Munchausen by Proxy
WebMD – Munchausen by Proxy
Wikipedia – Baron Munchausen
Wikipedia – Factitious Disorder (Self)
Wikipedia – Richard Asher

114. How much can a bladder hold?

Cancer.ca – About the Bladder
MedlinePlus – Urine and Urination
NIDDK – How Kidneys Work
Healthline – Bladder Holding Time
NCBI – Physiology of the Urinary Tract
HealthDirect – The Bladder
Urology Specialists – Nighttime Urination

115. Is cryosleep possible?

UT Daily Beacon – Ask a Scientist
Wikipedia – Cryonics
BBC Future – Space Travel
Upscale Living – Space Travel Tech
Space.com – Nearest Stars
NBC News – Cryosleep for Space
Medical Futurist – Waking from Cryosleep
Medium – The Truth About Cryosleep

116. Why do hyenas have long necks?

Wyzant – Hyena Leg Length
Hyaenidae – Hyena Necks
Biology Stack Exchange – Asymmetric Legs
Bali Safari Park – Hyena Facts
Tanda Tula – 9 Hyena Facts
Wikipedia – Hyena
Wikipedia – Spotted Hyena
San Diego Zoo – Striped Hyena
A-Z Animals – Strongest Bites

117. How does a heat-seeking missile work?

AusAirPower – IR Guidance
TechTarget – Infrared Radiation
NASA – Infrared Light
Wikipedia – AIM-9 Sidewinder
HowStuffWorks – Sidewinder Missile
Wikipedia – Chaff (Countermeasure)
National Defense Magazine – Smart Flares

118. What causes the “wall” when running?

Learn Genetics – Metabolism
Kaiser Permanente – Food to Energy
NCBI – Energy Systems
KidsHealth – Glycogen
Wikipedia – Glycogen
Cleveland Clinic – Glycogen
Mike Varney Physio – Hitting the Wall
Verywell Fit – What is Glycogen?
Verywell Fit – Bonk in Exercise
Wikipedia – Hitting the Wall
Marathon Handbook – Carbohydrate Loading

119. Why don’t shipping containers fall off ships?

Conexwest – Container Stacking
TIS – Container Deck Securing
ATR – Container Stacking
NTI – Container Loss Liability
Costamare – Containerisation
ICS – Shipping & World Trade
Wikipedia – Twistlock
Wikipedia – Container Ship

120. Why do Greenland sharks live so long?

NBC News – Longevity of Greenland Sharks
NOAA – Greenland Shark Facts
Wikipedia – Greenland Shark
Sport Diver – Aging Sharks
University of Iceland – Shark Ageing
Oceanwide Expeditions – Greenland Shark Facts
BBC Bitesize – Animal Adaptations
Wikipedia – Rate of Living Theory

121. How long do black holes last?

Astronomy – How Black Holes Die
Space.com – Black Hole Facts
Space.com – Do Black Holes Die?
Space.com – General Relativity and Gravity
ScienceAlert – Hawking Radiation
NASA – Black Holes
HowStuffWorks – Star Formation and Collapse
NASA – Black Hole Basics
LiveScience – Direct Collapse Black Holes
Wikipedia – Quantum Fluctuation

122. What is the difference between DVD and Blu-Ray?

Screenrant – History of Blu-ray
FileCatalyst – Movie File Sizes
Wikipedia – James Russell
Wikipedia – David Paul Gregg
Wikipedia – Optical Disc
Scientific American – What’s a DVD?
HowStuffWorks – DVD Player
Alliances Storage Technologies – Blu-ray vs DVD
Southtree – History of the DVD
Record Head – Blu-ray vs DVD

123. What are bruises?

LibreTexts – Blood Supply to the Skin
NCBI – Bruises Overview
Cleveland Clinic – Epidermis
Cleveland Clinic – Blood Vessels
Medical News Today – Bruise Concerns
Wikipedia – Bilirubin
Wikipedia – Biliverdin
WebMD – Easy Bruising
Verywell Health – Cirrhosis Complications
Medical News Today – Bruise Symptoms
WebMD – Causes of Bruises
Wikipedia – Bruise
Osmosis – Ecchymosis
Cleveland Clinic – Bruises

124. How do cactuses survive in the desert?

Wikipedia – Cactus
Byju’s – Cactus Adaptations
LiveScience – Cactus Survival
CactusWay – Cactus Adaptation
Eduscapes – Cactus Facts
McGill – Cactus Info
Grammarist – Cacti vs Cactuses
CactusWay – Desert Cactus Types

125. What causes Parkinson’s disease?

ScienceDaily – Parkinson’s Discovery
Parkinson’s Foundation – Is It Fatal?
National Institute on Aging – Parkinson’s Disease
Mayo Clinic – Parkinson’s Causes
Cleveland Clinic – Substantia Nigra
NHS – Parkinson’s Treatment