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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The familiar sounds of your heart are made by the heart's valves as they open and close.