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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Cyanide works by making the human body unable to use oxygen.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.