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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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