What happens when a part of our body “falls asleep”?
The sensation, called neurapraxia, usually occurs when a nerve is compressed between a bone and another hard object.
Blood continues to circulate through the affected area.
The highest elevation is Mount McKinley, Alaska, at 20,320 feet. The lowest is Death Valley, California, at 282 feet below sea level. The average elevation of the United States is 2,500 feet.
The hyoid bone resides by itself in the throat and does not connect with other bones. It supports the tongue and its muscles.
A human fetus develops fingerprints at the age of three months.
The continental shelf is an underwater ledge around the coastline of the world’s oceans. The edge of the shelf lies at depths of between 360 and 480 feet. The width may vary from a few feet to several hundred miles.
The prefrontal lobotomy was invented by Portuguese surgeon Antonio Caetano de Abreu Freire Egas Moniz (1874-1955) for patients with incurable mental disturbances. Moniz, who also served as the foreign minister of Portugal from 1918 to 1919, was awarded the Nobel Prize in physiology or medicine in 1949.
Quicksand doesn’t work by pulling you down. Quicksand is nearly always found above a spring, which creates a supersaturated condition that makes the sand frictionless and unable to support weight. In addition, quicksand is airless, which creates suction as you struggle to get free. The most effective way to escape quicksand is to position yourself…