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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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The average adult has about 21 square feet of skin.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
Did you know?
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.