There are 60,000 miles of blood vessels in every adult human.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
Map These Genes (Part 1)
Time Slows Down Near Matter
How is this worker trying to avoid becoming a depersonalized unit in a bureaucratic-economic ...
Economic and Social Development
The Geologic Time Scale
Incomplete dominance in flowering time of pea plants