What causes muscle cramps? There are several potential reasons, but nobody actually knows the real reason. Whatever the reason, all cramps happen in the same way. You may be exercising or you may be at rest, but your muscle will suddenly and involuntarily contract. This can be extremely painful and alarming. The only thing you […]
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Why do cars only have five gears? They actually don’t. Some cars have 4 and some cars have 6 or 7. Modern cars have an infinite number and electric cars don’t have any. Most manual cars have five gears, but that doesn’t mean all cars have five. However, five is the most common number because
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Why are some animals cold-blooded? It lets them go for longer without eating, which means they can survive in more inhospitable areas. There are three types of animals: warm-blooded, cold-blooded, and those in between. Warm-blooded animals are called endotherms and they are able to maintain their body temperature by using their metabolism. We are endotherms.
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How high can a plane and helicopter fly? The world record for the highest a plane has managed to fly after taking off from the ground is 123,523 feet, or 37,649 meters. (The record stipulates taking off from the ground because planes that have flown higher than this are basically rockets with wings that have
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What is the difference between a crocodile and an alligator? There are many differences, including their color, size, snout shape, where they live, behavior, the strength of their bite, and many more. Both crocodiles and alligators come from the family crocodilian. They appeared about 94 million years ago and have a thick scaly skin. They
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How is an addict’s brain different to a non-addict’s? They have significant changes in the reward, stress, and self-control parts of their brains. Whether or not someone becomes an addict is based on a number of things, but experiments have shown that up to 50% of that risk is genetic. One of these experiments looked
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How do pythons kill their prey? They squeeze their prey to constrict blood flow before consuming the prey whole. Before we start, pythons are not boa constrictors. I always thought they were the same thing, but they aren’t. Pythons are longer than boa constrictors and they come from different areas. Boa constrictors are found in
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How is sewage treated? There are several different methods, but sewage generally goes through four steps before the water is safe enough to drink. Sewage isn’t only the wastewater from our toilets. It can be other wastewater from our houses, containing soaps and household products. It can also be industrial wastewater, containing chemicals and other
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Where did Jazz come from? It started in New Orleans in the 1890s. What is Jazz? The word “jazz” probably comes from “jasm”, a slang expression meaning pep or energy. Jazz started out as jas and didn’t become jazz until about 1916. That means jazz wasn’t really considered a separate style of music for almost
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Could Earth survive without the moon? The planet would survive, but the living organisms on it might have a harder time. The moon was probably formed when another protoplanet hit the young Earth, obliterating both and making the Earth and moon from the resultant mush. The moon began life at a distance of about 22,500
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