A rhesus macaque on Cayo Santiago, which is less than a mile east of Puerto Rico. Rhesus macaques spend upwards of 20 percent of their time engaged in cooperative behaviors
In the fall of 1985, Scott L. Gardner found himself standing over his toilet bowl, fishing around in the squishy output of his empty bowels with a chopstick. He had
Photographs selected by Quentin Nardi Text by Tracy Scott Forson Endangered, only about 4,500 tigers live in Asia and parts of the Middle East, down from 100,000 in 1900. While
Text by Tracy Scott Forson Photographs selected by Jeff Campagna August 12 is World Elephant Day, which has been celebrated since 2012 as a time to support elephant conservation and
Marine biologist Dimitri Deheyn walks over to an isolated aquarium in a room at the Scripps Institution of Oceanography. All around him, pumps churn in blue vats, rubber boots squeak
Namibia’s brown hyenas live in small clans but often travel and hunt alone. Thorsten Milse/robertharding/Getty Images Some wild animals are relatively easy to study. Certain penguin populations, for instance, are