How Did People Clean Their Teeth Before Toothbrushes Were Invented?
How Did People Clean Their Teeth Before Toothbrushes Were Invented? Most people today clean their teeth with brushes made of plastic and nylon. But if you had lived one...
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What Is a Stinging Nettle?
What Is a Stinging Nettle? A stinging nettle is one of a group of plants that have stinging bristles. They are coarse herbs found in the northern temperate regions....
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How Do Baleen Whales Eat?
How Do Baleen Whales Eat? Not all whales have big teeth, or throats large enough to swallow a man. Whales known as “baleen” whales have throats that are so...
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How Did the Black Widow Spider Get Its Name?
How Did the Black Widow Spider Get Its Name? The black widow spider got its name because the female sometimes kills the male after mating. The female black widow builds...
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