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Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
Did you know?
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.
Did you know?
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.