How Is Dry Milk Made?
Dry milk is made by evaporating the water from milk, so that only the milk solids remain. The purpose of drying milk is to preserve it; milk powder has a far longer...
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What Causes a Cold?
What Causes a Cold? Common colds are caused by a type of germ known as a cold virus. This germ infects your nose and throat, causing you to sneeze and sniffle, and your...
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Why Do We Say That a Cat Has Nine Lives?
Why Do We Say That a Cat Has Nine Lives? The expression that a cat has nine lives originated in ancient Egypt. There, cats were worshiped as gods and often embalmed and...
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What Causes Freckles?
What Causes Freckles? Freckles are caused by the brown skin pigment called melanin. All of us have some melanin in our skin. Usually, this brown pigment is evenly...
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Are Elephants Really Afraid of Mice?
Are Elephants Really Afraid of Mice? It isn’t true that elephants are afraid of mice. Because the elephant is such a big animal, however, it is amusing to imagine that...
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How Do Dolphins Sleep in the Ocean?
How Do Dolphins Sleep in the Ocean? Dolphins don’t sleep soundly at night like we do. When it’s time to rest, a dolphin undergoes an unusual form of sleep called...
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Do Fig Trees Have Flowers?
Do Fig Trees Have Flowers? Yes, fig trees have flowers. Hidden inside the fig itself, there are many tiny, true flowers which produce pollen and what we call “seeds.” A...
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How Does Milk Sour?
How Does Milk Sour? Milk contains a sugar called lactose. It also contains harmless bacteria called lactobacillus, which uses lactose for energy and creates lactic acid...
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How Are Pop-up Books Made?
Pop-up books are just one particular type of a larger group of books known as movable or mechanical books. In addition to pop-up books, movable books include...
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How Are Dimes and Quarters Made?
How Are Dimes and Quarters Made? In minting U.S. dimes and quarters, a blanking press cuts coin-sized blanks from strips of coin metal. The metal used for the coins...
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