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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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.
Approximately 25% of all reported medication errors result from some kind of name confusion.
Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.