Why do crabs use sea anemones as weapons? The crab, known as the pom-pom crab, uses sea anemones to defend against predators and to sting its prey. There are three types of symbiotic relationships in the world. The first is mutualism. In a mutualistic relationship, both parties receive a benefit that they would not be […]
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What is Peto’s Paradox? Peto’s Paradox is an observation that the occurrence of cancer in an organism doesn’t increase in line with the number of cells that organism has. Because cancer is caused by mutations in cells, it would be logical that the more cells an organism has, the more occurrences of cancer it will
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How does a hair transplant work? The basic idea is to take hair from the part of your head that still has it (usually the back) and transplant it to the part of your head that no longer has hair (usually the front or the top). Baldness is fairly common, and it is estimated that
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Why don’t giraffes faint? Giraffes don’t faint because they have a very strong heart and a very high blood pressure. If we bend over and then stand up again, we get a head rush. Sometimes it can be so bad that you faint. This is called orthostatic hypotension. Your blood pressure is set at the
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Why does a paper cut hurt so much? Paper cuts hurt so much because of the roughness of the paper, the places we are most likely to cut, and the size of the cut. The first reason that paper cuts hurt so much is because of the paper itself. Paper is made from a dried
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What causes liver spots? Despite their name, liver spots are caused by prolonged exposure to Ultra ultraviolet light and don’t have anything to do with the liver. As people age, they get more wrinkles, their muscles don’t work quite as well, and they get dark brown blemishes on their skin. These spots are called liver
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How do birds balance on a phone line? Birds can balance on a phone line because of the way their feet and legs work, their size, their vestibular system, and their balance organs. Birds can perch on pretty much anything without any trouble. In fact, they can also sleep perched on things like power lines
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How does anthrax kill? An infection of the anthrax bacteria can kill because the bacteria produce toxins that can kill an animal or a person. Anthrax is the name for the infection caused by a bacteria called Bacillus anthracis. It is a rod-shaped bacterium that is about 3 to 5 micrometers long. The average human
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Were dinosaurs warm-blooded or cold-blooded? The majority of dinosaurs were most likely warm-blooded. “Dinosaur” comes form the Greek “deinos”, which means terrible, and “sauros”, which means lizards. They are terrible lizards, which would lead many people to think that they were cold-blooded, as most lizards are today. Lizards have evolved to be cold-blooded because it
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What is the problem with invasive species? The problem with invasive species is that the ecosystem they are invading has not evolved to deal with them, and they can cause widespread damage. Plants and animals have always managed to spread outside of their own ecosystem, but they are always controlled by the conditions or by
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