Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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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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Vaccines prevent between 2.5 and 4 million deaths every year.
Vibrissae of captive walrus (Japan)
Cultural Variations in the Strange Situation Across cultures, most toddlers exhibit secure attachme