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In 1864, the first barbiturate (barbituric acid) was synthesized.
Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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.