What did the peppered moth do? It changed from a light color to a dark color during the Industrial Revolution. The peppered moth is native to most places in the northern hemisphere. They are about 5.5 cm with their wings spread out. They fly at night and they are generally a mix of light colors […]
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How many different eye colors do people have? There are only 6 different eye colors. They are amber, blue, brown, gray, green, and hazel. There are many different colored eyes in the animal kingdom, but humans are far more limited in eye color than we think. Out of the six colors, brown is the most
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Why was the Great Wall of China built? It was built to protect the territory of the new Chinese empire, to protect the silk road, because the labor was available, the emperor wanted to be remembered, and as a show of power. The official length of the Great Wall of China is 21,196.18 km long.
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What is DDT? It stands for dichloro-diphenyl-trichloroethane and was the first synthetic pesticide. It was banned in 1972. DDT didn’t start being used in large quantities until after the Second World War, but it had been discovered quite a while earlier. Othmar Zeidler, an Austrian chemist, first synthesized DDT in 1874. Nobody realized that it
How does a cheetah run so fast? It is a combination of their body weight, their claws, their spine, their joints, the type of muscles they have, their tail, their organs, and the size of their head and skeleton. Cheetahs are the fastest land animals. They have a top speed of approximately 113 km/h and
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What does it mean to impeach a president? Impeachment is the process by which any federal official can be charged for doing something wrong and then removed from office. When we think of impeachment, we probably think of Bill Clinton and Donald Trump being impeached. Or perhaps we think of Richard Nixon resigning before he
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What is the immortal jellyfish? It is a jellyfish called Turritopsis dohrnii that can revert to a sexually immature stage in its life and theoretically live forever. There are many organisms that are very long lived. There are plant organisms that are thousands of years old. A colony of quaking aspens is thought to be
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What causes malaria? It is caused by a parasite of the Plasmodium group and it is spread through the bite of a female Anopheles mosquito. The parasite is said to be from a group because there are five different parasites. They are called Plasmodium falciparum, Plasmodium vivax, Plasmodium Malariae, Plasmodium ovale, and Plasmodium knowlesi. The
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Can insects fly in the rain? They pretty much all can, but many of them choose not to. Some do fly during the rain. It depends on their size, the temperature, and their ability to resist water. Interestingly, larger insects have more need to hide than smaller insects do. When the day is warm, insects
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Were gunslingers real? There were people in the Wild West who were employed to shoot people, or who did it for other reasons, but they weren’t called gunslingers. That term didn’t come into existence until 1920. The image we have of gunslingers is pretty much entirely a myth that we can thank the Spaghetti Westerns
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