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Author Question: In a contest, two tractors pull two identical blocks of stone the same distance over identical ... (Read 1607 times) |
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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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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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.