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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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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The average adult has about 21 square feet of skin.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.