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Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
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The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.