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Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
The average adult has about 21 square feet of skin.
Did you know?
About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
Did you know?
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
Did you know?
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.