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Some male birds and mammals congregate in communal courting grounds called leks.
Giraffe bending down to drink. The animal's rete mirabile prevents excess blood flow to the bra
Laparoscopy. A lighted endoscope specialized for insertion into the abdomen, called a laparoscope, i
The approval of a new drug is a four-stage process: (1) preclinical investigation, (2) clinical inve
In 1839 Mary Cragin, at the age of twenty-nine, became a convert to John Humphrey Noyes’s “communism
El Niño/La Niña reverses flow