What Is a Truffle?
What Is a Truffle? A truffle is a kind of black, potato-shaped mushroom that grows underground, usually among the roots of trees. Truffles grow wild in England, France...
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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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