Thirteen million years ago, a group of medium-sized monkeys known for guarding their territory among the treetops with fearsome "howls" started doing something new. These monkeys, among the oldest ...
An extinct relative of the howler monkey may have been the first leaf-eating primate in South and Central America ...
There have been no confirmed sightings of Tanzania’s critically endangered southern patas monkeys for more than a year, raising fears the species is edging ever closer to extinction. In 2021, there ...
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