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Why don't you usually see your nose?Our nose is right in front of us. So why don't we normally notice it?
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Could there ever be a worldwide internet outage?We've all dealt with bad internet connections. But could the entire internet ever collapse?
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How much of your body could you lose — and still survive?Five vital organs are essential for life, but survival is more medically complex.
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What's the oldest river in the world?The oldest river predates the dinosaurs. But how do we know this?
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Why doesn't stomach acid burn through our stomachs?The hydrochloric acid in your stomach can burn through metal — so why doesn't it burn through your stomach?
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Did any cat breeds develop naturally?Humans have undoubtedly bred cats to create certain breeds, but did any of these feline breeds emerge naturally?
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How common is it to have extra bones in your skeleton?Adult human bodies typically have about 206 bones. But is it possible to have more?
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How many holes does the human body have?You might think that the human body has many holes, but that number shrinks when you stop to consider what counts as a hole.
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Is the sun really a dwarf star?Our sun is huge, at least compared to Earth and the other planets. So is it really a dwarf?
