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There are more bacteria in your mouth than there are people in the world.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.