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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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.
In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.