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The human body produces and destroys 15 million blood cells every second.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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Everyone has one nostril that is larger than the other.
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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.