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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.
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.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.