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Did you know?
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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People about to have surgery must tell their health care providers about all supplements they take.
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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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.