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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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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There are more sensory neurons in the tongue than in any other part of the body.
Chimpanzees in the Gombe National Park, Tanzania groom each other by holding an overhead branch with
