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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.
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.