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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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Blood is approximately twice as thick as water because of the cells and other components found in it.
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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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There are more bacteria in your mouth than there are people in the world.
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Vaccines prevent between 2.5 and 4 million deaths every year.