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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The average office desk has 400 times more bacteria on it than a toilet.
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The horizontal fraction bar was introduced by the Arabs.
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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
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Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.