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Your heart beats over 36 million times a year.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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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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Everyone has one nostril that is larger than the other.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).