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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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.
The Scopes Trial: William Jennings Bryan (right) represented the state of Tennessee, and Clarence Da
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Illustration of the Brain Lobes Showing Location of Broca’s Area and Wernicke’s Area
Clear the inguinal catchment area. Face the side of the table at recipient’s waist. Place your ...
The four levels of PPE according to the EPA (from left to right): Level A, Level B, Level C, and ...
How to find the volume and surface area of any triangular prism