Why is a broken neck fatal? It isn’t always fatal. It depends on the break. Breaking a neck is a very broad term. There are 33 bones in the spine of the average person. 7 of those bones are in the neck. They are called cervical vertebrae and they have three main jobs. The first […]
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What happened to biplanes and triplanes? They produce too much drag, which means they can’t fly fast enough and they use a lot more fuel. The first planes built were biplanes. The first heavier-than-air plane was a triplane. Sir George Cayley built a glider with three wings in 1848. He managed to convince a local
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Why is Greenland part of Denmark? Greenland was a colony of Denmark, but it didn’t officially become a part of Denmark until 1953. It is technically defined as a district of Denmark. The reason why Greenland is a part of Denmark goes back to before Denmark was actually a country. People have lived in Greenland
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Why are clouds at different heights? It depends on the temperature and the pressure of the air. Clouds start when water vapor evaporates off the surface of the Earth into the air. The sun heats the ground, or the surface of the sea, supplying it with thermal energy. If there is enough thermal energy, the
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How do some animals walk up walls? They do it thanks to either tiny hairs on their feet or sticky pads. Animals that can walk up walls tend to divide into two categories: sticky feet or hairy feet. They all also rely on the Van der Waals force. Animals that walk up walls have to
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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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