In 1864, the first barbiturate (barbituric acid) was synthesized.
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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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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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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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The average adult has about 21 square feet of skin.
Platystictidae is a family of damselflies, commonly known as shadowdamsels.
Torticollis
Meningocele. (a) A meningocele is a herniation of the meninges, usually associated with the spinal c