The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
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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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
Did you know?
The FDA recognizes 118 routes of administration.
False-color imagery of the Sun, a G-type main-sequence star, the closest to Earth.
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