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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
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.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
The average adult has about 21 square feet of skin.