The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Thyroid conditions may make getting pregnant impossible.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
The Pleiades, an open cluster of stars in the constellation of Taurus. These stars share a common mo
Spitzer Space Telescope
Neurons
Passive touch on shoulders to end. Hold for 5 to 10 seconds.