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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.