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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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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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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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The horizontal fraction bar was introduced by the Arabs.