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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.