Why Does Jelly Wobble and Wiggle?
Why Does Jelly Wobble and Wiggle? The gelatin we eat in Jelly typically comes from collagen extracted from the ground bones, hooves, and connective tissues of animals...
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What Are Owl Pellets?
What Are Owl Pellets? Owls swallow tiny prey animals, such as mice, in one gulp—fur, bones and all. The indigestible fur and bones are packed together inside the...
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How Does an X-ray See Inside You?
The X-ray picture a doctor uses to see inside your body is really a shadow picture of your bones and organs. X-rays are a kind of invisible ray. They are related to...
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How Do We Hear Sounds?
How Do We Hear Sounds? When sounds are made, they set up movements in the air. These movements are called sound waves. The cup-like shape of the outer ear collects the...
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Why Can Birds Fly?
Why Can Birds Fly? A bird’s body is specially built for flying. First of all, a bird has feathers and wings, and powerful muscles with which to flap them. Its...
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