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Did you know?
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
Did you know?
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

