How is silk made? It is made from the cocoon of the silkworm. Silk is a natural material that has been around for over 5 thousand years. Silk was first made by the Yangshao culture in China in the 4th millennium BC. One legend has it that an Empress was drinking tea and a silkworm […]
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Why can grasshoppers jump so high? They can store energy in their exoskeleton and release it like a spring. Grasshoppers are not all the same. They are a small group of insects in the Caelifera family, which contains about 12,000 species. Locusts are grasshoppers and they belong to this family, and many other insects that
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How do polar bears find enough food? By having an exceptional sense of smell, a lot of patience, and a very efficient digestion. Polar bears are the largest bear species by far. An adult male can weigh close to 800 kg, and they are about 160 cm at the shoulder. When they stand up and
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How does a rattlesnake rattle? They have loose hollow scales on the tips of their tails that strike each other when the rattlesnake rattles its tail. Rattlesnakes are a type of viper and are venomous snakes. There are many different types of venomous snakes, and they are divided by the position of their fangs and
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How do birds land? It depends on the size of the bird and whether it is a landing on land, a branch, or water. Generally, they lose as much speed as possible and grab on. The physics behind the way birds fly is the same as for airplanes. Anything that flies needs lift and thrust,
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Why are blueberries blue and strawberries red? Because of the animals the plants want to eat their fruit. Flowers and fruit tend to be a certain color because they have either evolved to attract a certain kind of animal or to repel a certain kind of animal. A lot of flowers and animals as well
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How big was a Megalodon? The largest ones could have been 20 meters long. Megalodon was a species of giant mackerel shark. Mackerel sharks have two dorsal fins, an anal fin, five gill slits, eyes without nictitating membranes, and a mouth that extends behind the eyes. Great white sharks are in this family. Megalodons lived
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How does the female lac bug make plastic? They scrape bark from trees and mix it with a resin that they produce. The female lac bug produces a resin, which is a plastic. Plastics are made when molecules connect together to make long chains of polymers. These are what give plastics their strength and durability.
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How do animals find water? They have many methods. Some animals can smell or sense water. Some animals get their water through eating plants. Some animals have evolved to need less water or to store water. Some animals can drink water that we couldn’t. Many animals instinctively know what signs to look for to find
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Why do some birds have red eyes? Birds with red eyes have a lot of tiny blood vessels in their eyes. Human eyes come in one of six colors. Our Eyes can be amber, blue, brown, gray, green, hazel, or pink. Pink eyes are actually a result of albinism. If someone is born albino, they
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