How could EMAS save planes? EMAS systems can bring planes that overshoot the runway to a safe and rapid stop. EMAS stands for Engineered Materials Arresting System, and they are being introduced into some airports. Runways around the world come in a variety of lengths, and planes need different lengths depending on a whole variety […]
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What is a superbug? A superbug are bacteria, viruses, or fungi that have developed resistance to many different types of drugs. We often hear about superbugs on the news. They wreak havoc on places like hospitals. They are very hard to deal with, and the people in the hospital usually have compromised immune systems, which
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How many atoms are there in the vacuum of space? Technically, in a true vacuum, there would be zero atoms, but it is impossible to make a completely true vacuum. There will always be some atoms. In intergalactic space, there are 0.3 atoms per cubic meter, on average. Obviously, some areas of space have an
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How do ants act as a superorganism? Ants are a superorganism because all of the individual ants function together as a single being. They all have different roles and functions, just like the cells in our bodies do. Ants are not the only beings that act as a superorganism. Any species where all of the
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How does cling film stick? Cling film (also called plastic wrap, saran wrap, cling wrap, and food wrap) sticks to surfaces because of static electricity and because of the properties of the plastic it is made of. Cling film (Saran wrap) is another of those products that we can’t live without, but which were discovered
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Why do geysers form? Geysers form where the groundwater is heated by geothermal vents until it boils. This steam builds up until the pressure is too great and it erupts out through weak points in the rock. The word geyser comes from the name of a geyser in Iceland back in 1780. It was called
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How do bats use echolocation? Echolocation works on the same principle as sonar in a submarine, but bats have special adaptations to be able to use it. The principle behind echolocation and sonar is that you send a sound wave out and then measure how long it takes to come back to you and the
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How do fires regenerate forests? Fires can regenerate a forest because they clear the thick canopy, they release nutrients into the soil, and they can trigger the dispersal of seeds from a lot of trees. As forests grow, they naturally get thicker and taller. Trees need sunlight and leaves to photosynthesize. If a tree cannot
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Why do some sand dunes sing? Sand dunes sing because the grains of sand slide down their sides and make vibrations that become sound waves. Sand dunes can form anywhere with sand, but the really large ones are more common in deserts. Different types of sand can make different dunes, but they are formed in
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Why can’t we see the far side of the universe? We can’t see the other side of the universe because there hasn’t been enough time since the beginning of the universe for that light to reach us, and the universe is expanding faster than the light can travel. The first reason we can’t see the
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