The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
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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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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Roosevelt elk in Oregon, USA
People riding bikes in Netherlands
Where do you think these people fit in Gans’ classification of urban dwellers?
Plasma protein binding and drug availability. (a) Drug exists in a free state or bound to plasma ...