What makes our hands different to other animals? We have an opposable thumb. We have four fingers and a thumb on each hand. We are not the only animals to have this many fingers, and we are not the only animals to have an opposable thumb, but the reach of our thumb sets us apart. […]
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Why are UK public schools actually private schools? They were not attached to a church and were open to the fee-paying public. They are technically not for profit charities. In most countries, public schools are run by the government and private schools are run by private institutions. In the UK, public schools are a different
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How do millipedes control their legs? Millipedes use a direct-wave gait. That means the legs move from the back to the front in a wave pattern, moving the millipede forwards. Millipedes are invertebrates, which is a cold-blooded animal with no backbone. They have an exoskeleton and they are made of multiple segments. They come from
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Why do fingernails keep growing? So that we always have them. If they didn’t keep growing, they would get worn down and be of no use. How do nails grow? Nails are made of keratin, which is the same substance our hair is made of. Keratin is a fibrous protein that is very tough and
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How is Easter calculated? Easter is the first Sunday after the full Moon that occurs on or after the spring equinox. When to celebrate Easter is a problem that has taxed the church for centuries. The date of Easter is very important for the Christian church because the whole religion revolves around the birth and
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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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