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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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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 oral chemotherapy drug for colon cancer was approved by FDA in 2001.