What is hyperthermia? It is an abnormally high body temperature. The average body temperature is between 36.5 ˚C and 37.5 ˚C. Under 35 ˚C and you have hypothermia. Between 37.5 ˚C and 38.3 ˚C you have fever. Over 38.3 ˚C, you have hyperthermia. Our body has various systems to keep us cool. All of these […]
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Is a photographic memory real? It has never been conclusively proven, but there are some people who come close. Memories are vital evolutionarily. They let us know who is in our pack, where to find food, how to get home, and so many other things in life. There are a lot of animals that have
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Why do insects have an exoskeleton? To stop them drying out, for protection, for support, and to help them sense their surroundings. An exoskeleton is a hard skeleton that covers the body of an insect. Animals that have an internal skeleton, like us, have an endoskeleton. An exoskeleton is made of chitin, which is a
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Why are there 12 signs of the Zodiac? Because the Babylonians decided that there should only be 12. What are the signs of the zodiac? The signs of the zodiac are the symbols that represent the 12 different constellations that the sun passes in front of throughout a year. They are all found in a
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Why do eyes get worse with age? It happens because the lenses of the eye become less flexible and it becomes difficult to focus the light. How does the eye work? Light photons come from the sun, or any other light source, bounce off an object and go into our eye. The light enters through
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When did people start using flushing toilets? It was invented in 1596, but didn’t start to become common until the 1850s. People have used toilets for thousands of years, but they were usually just a pit or a hole. The first toilet to use a drainage system and running water was found by archaeologists in
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What causes narcolepsy? There are several possible causes. It could be a lack of the chemical hypocretin in the brain, but there are other possible causes as well. Narcolepsy is a brain disorder that makes people unable to stay awake for long periods at a time. They become very drowsy and can fall asleep suddenly.
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How strong is armadillo armor? Extremely strong, but not strong enough to stop a bullet. Armadillos are native to the Americas and their name means “little armored ones” in Spanish. They have short legs and very long claws that they use to dig up insects to eat or to burrow. They can run extremely quickly,
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Why can’t we fix frostbite? If the frostbite is bad enough, the blood supply to the tissue will be cut off and it will die, possibly causing gangrene. Frostbite can form in any temperatures below -0.55 °C because that is low enough for water to freeze. However, in mild temperatures such as that, frostbite is
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How are foods frozen? They are dipped in something cold, pressed between cold plates, or exposed to cold air. Once vegetables or fruits are picked, or once meat is butchered, they have to be frozen as quickly as possible. The second these foods are exposed to the air, they start to break down. The faster
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