What is the difference between slugs and snails? There are several differences but a big one is that snails have a coiled shell on their backs and slugs have a soft shell underneath their flesh. Snails and slugs have a lot more similarities than they have differences. Let’s look at the similarities first. Both snails […]
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What are food additives? They are things that are added to food to preserve the flavor, or improve the taste, appearance, or other qualities. There are a huge number of food additives and some of them are completely natural. Salt and sugar are both food additives. Humans have been using food additives ever since we
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Why is sea level where it is? Because the volume of water in the oceans fills all of the valleys that make up the oceans to a certain depth, and that depth is sea level. When water is poured into a container, the surface of the water will always be flat, no matter how flat
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How does Ransomware work? By infecting the computer, encrypting all the files, and then trying to sell the victim the decryption key. The first ever ransomware was created in 1989, by an evolutionary biologist at Harvard called Dr. Joseph Popp. To this day, nobody knows why he made it. The Internet wasn’t as extensive then
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What causes a stroke? There are different types of strokes, but the most common is an ischemic stroke and it is caused by a blockage in one of the blood vessels in the brain. The brain has a huge oxygen requirement. It is only 2% of your bodyweight, but it uses 15 to 20% of
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Too busy to read? Watch on YouTube. When did archaeology start? Archaeology started as a discipline in the 18th century. Before the beginning of archaeology as a discipline, there were two types of people that were interested in things from past civilizations. Those were people who liked to collect artifacts, and people who wanted the
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Too busy to read? Watch on YouTube Why do ducks float? They float because of their center of gravity, their hollow bones, the air in their feathers and air sacs, and the oil on their feathers. Whether or not something floats has to do with the object’s density and the buoyancy of water. Water has
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Too busy to read? Watch on YouTube Are ants and termites the same thing? No. They belong to different insect orders. Termites are from the Isoptera order and ants are from the Hymenoptera order. Termites and ants are easily confused and they have a lot of similarities, but they have a lot of differences as
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Watch this on YouTube Is Earth an open or closed system? It is both. For some things it is open and for others, it is closed. Earth is an open system for energy. Most of the energy on Earth comes from the sun. Energy enters Earth from outer space as well, but the sun is
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Watch on YouTube Why were the Terracotta Warriors buried? They were buried to protect Qin Shi Huang, the first emperor of China, in the afterlife. Qin Shi Huang was a very influential ruler of China. He was the first emperor of a unified China and a lot of things were begun in his reign. He
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