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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.

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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

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Everyone has one nostril that is larger than the other.

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Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

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Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Insect species diversity on British host trees supports the area hypothesis. Insect species diversity on British host trees supports the area hypothesis.
The Pantanal, Brazil, seen here in flood condition, is a critical jaguar range area. The Pantanal, Brazil, seen here in flood condition, is a critical jaguar range area.
The locations of human primary somatosensory cortex (SI) and one area of secondary somatosensory ... The locations of human primary somatosensory cortex (SI) and one area of secondary somatosensory ...
Case of ONJ that occurred spontaneously. Note the white area, which is exposed necrotic bone. Case of ONJ that occurred spontaneously. Note the white area, which is exposed necrotic bone.
How to find the area of composite figures (Part 1) How to find the area of composite figures (Part 1)
A container in the shape of a right circular cylinder with no top has surface area square feet. A container in the shape of a right circular cylinder with no top has surface area square feet.
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