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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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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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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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Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.