Why did prehistoric insects grow so big? Because there was a lot more oxygen in the atmosphere and there were no birds. The largest insect in the world today is the Phryganistria chinensis, which is a stick insect. It is 64 cm long. The insect with the largest wingspan is the White witch moth, which […]
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When was the first air conditioning invented? It was invented on July 17th, 1902. The first electrical air conditioning, the predecessor of what we use today, was invented in 1902, but people have been using forms of air conditioning for thousands of years. The first methods to cool buildings relied on architecture. Ancient buildings have
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What do worms do? They break down organic matter in the soil and release the nutrients in their waste. Earthworms may all look the same to us, but there are 7,000 different species of them across the world. 150 of those species are the ones we commonly see. There are far more worms in the
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Do antibiotics kill all of the bacteria in the body? Yes, they do. Antibiotics kill bacteria in the body. They do not work on viruses. We use bacteria when we have an infection and they can be very effective. An infection is caused when we have a wound and bacteria get inside. This is very
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Who were Smith and Wesson? They were both inventors, gunsmiths, and businessmen. They obviously formed the Smith & Wesson firearms company. The Smith & Wesson company was formed in 1852. The original company was sold to a man called Oliver Winchester, and it became the Winchester company that still exists today. Smith & Wesson was
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Can a binary star system have planets? Yes. There are two types. There are circumbinary planets that orbit both of the stars and there are circumstellar planets that just orbit one of the stars. A binary system is where two suns are gravitationally connected to each other and they orbit around a common center of
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Why are clouds white? Because the water particles in the clouds scatter light equally. When light comes out of the sun, it is white. That is to say, it emits all of the colors of the color spectrum. The sun emits light as radiation and it emits radiation across almost all of the electromagnetic spectrum,
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What is the difference between a wigwam and a teepee? They have a different shape, are made of a different material, are constructed differently and are used in different regions. The only real similarity is that they are both used by Native Americans as a place to live in. A teepee is a conical tent
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Where do modern military ranks come from? There is not one single point where they started. Many countries have different systems and they have all evolved over time. Most of the ones we use in the West came from Italian and French. You don’t need ranks unless you have an organized army. In the beginning
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Do cows only eat grass? Wild cows and cows that graze on pasture eat a lot of grass, but they also eat other plants as well. Cows that are kept in dairy farms are often fed a lot of grain and soy. There are not many wild cows in the world. In most developed countries,
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