How do insects survive the winter? A lot of insects don’t survive the winter, and they haven’t evolved to. They are born, live long enough to reproduce, lay eggs, and die. However, that does not mean the species dies out. Many insects survive winter as eggs, larvae, nymphs, or pupae. Other insects live through the […]
#1690 How do insects survive the winter? Read More »
How can some animals be transparent? Animals can be transparent if their bodies let light pass through them without absorbing, reflecting, or scattering too much of it. There are not many transparent animals, and most of them are found in water. Some of them are partially transparent and some are almost completely transparent. Even animals
#1689 How can some animals be transparent? Read More »
How did the Allies keep D-Day a secret? The Allies kept D-Day secret through a mixture of deception, censorship, and need-to-know security. D-Day was Tuesday, June 6th, 1944. The landings in Normandy were the beginning of the Allied return to Western Europe. The overall campaign was called Operation Overlord, and the naval invasion itself was
#1688 How did the Allies keep D-Day a secret? Read More »
How do you dismantle a skyscraper? There are several ways to dismantle a skyscraper, but none of them are easy. The method depends on where the skyscraper is located, what it is made of, how tall it is, and what is standing around it. The first skyscrapers were built in the 1880s. They were made
#1687 How do you dismantle a skyscraper? Read More »
Do people actually live in igloos? People don’t usually live in snow igloos permanently, but some Inuit groups historically used them as winter homes or temporary hunting shelters. The English word “igloo” comes from the Inuit word “iglu,” which means house or home. It does not necessarily mean a house made of snow. In some
#1686 Do people actually live in igloos? Read More »
What is jerky? Jerky is traditionally strips of dried meat that are eaten as a snack or as a way to get protein and energy on long journeys where there is no access to refrigeration. The concept of jerky has been around for thousands of years, but the word has only existed in English since
#1685 What is jerky? Read More »
Why were spices so valuable in the past? You can buy a jar of spices today for a few dollars, but for a large part of history, some spices were extremely valuable. A few were even said to be worth their weight in gold. This was generally down to how hard they were to get,
#1684 Why were spices so valuable in the past? Read More »
How does a spring work? A spring works by storing mechanical energy when it is deformed and then releasing that energy when it returns to its original shape. Springs don’t have to be metal, but in human-made springs, metal is probably the most common material. There are natural springs as well. The tendons in a
#1683 How does a spring work? Read More »
What is the watershed? A watershed is a turning point or a dividing point between two times or events, although the word originally comes from geography. In geography, a watershed is an area of land that drains water to a specific point. Another word for a watershed is a drainage basin. It is basically the
#1682 What is the watershed? Read More »
How do escalators move at almost the same speed when they are empty and when they are fully loaded? Escalators can move at almost the same speed no matter how much weight is on them because their motors are designed to run at a steady speed and produce more torque when the load increases. Chairlifts
