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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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If you could remove all of your skin, it would weigh up to 5 pounds.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.