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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.
Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
Blood is approximately twice as thick as water because of the cells and other components found in it.
Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
![Creede, Colorado, circa 1890, a rough silver mining town that grew from 660 people in 1889 to over 1](https://biology-forums.com/gallery/47/medium_376063_22_08_15_11_31_04_223802300.jpeg)
![L. Frank Baum, author of The Wonderful Wizard of Oz (1900) and a fan of William Jennings Bryan, perh](https://biology-forums.com/gallery/47/medium_376716_26_08_15_11_16_37_22450198.jpeg)