Where Does Saliva Come from?
Saliva enters the mouth from three pairs of glands around and under the tongue. The glands that make it are called salivary glands. The salivary glands sit inside each...
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Why Does a Cow Chew Its Cud?
Why Does a Cow Chew Its Cud? Chewing a cud is the way a cow digests its food thoroughly. A cow has a special stomach with a storage section called a “rumen.” When the...
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How Did the Hamster Get Its Name?
How Did the Hamster Get Its Name? The hamster gets its name from the German word hamstern, which means “to hoard.” This is because the hamster does just that — it...
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Why Do Some Eggs Have Two Yolks?
Why Do Some Eggs Have Two Yolks? A common misconception is that a double-yolk comes from a “twin egg.” It may be possible for a fertilized double-yolk egg to produce...
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Why Are Polar Bears White?
Why Are Polar Bears White? The bear’s color helps it to find food. Polar bears live in a part of the world that is usually covered with snow and ice. Often they...
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