Charles Darwin wondered if animals were aware of themselves. Allowed to visit a rare orangutan in the London Zoo, he brought a mirror and observed the ape apparently make faces at its own reflection.

Before each test, the monkeys received a visual cue indicating potential prizes—small, medium, large, and “jackpot,” which was 10 times the size of the medium reward.

Unlike humans and great apes, rhesus monkeys don't realize when they look in a mirror that it is their own face looking back at them. But, according to a new report, that doesn't mean they can't ...

Male proboscis monkeys use their unique nasal cavities to get noticed. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. Search for: ...

Scientists based in China have created a monkey chimera with two sets of DNA, experimental work they say could ultimately benefit medical research and the conservation of endangered species.

Monkeys seem to learn the same way as humans psychologists report in the journal Psychological Science. Like humans, monkeys benefit enormously from being actively involved in learning, instead of ...

Scientists studying footage from Jicarón Island spotted something unusual: a capuchin monkey carrying an infant howler on his back. Now, they’re trying to learn what it means.

As a result, the monkeys communicate with grunts, coos and other similar sounds, the scientists conclude December 9 in Science Advances. “Macaques have a speech-ready vocal tract but lack a ...

Monkeys can keep strings of information in order by using a simple kind of logical thought. Rhesus macaque monkeys learned the order of items in a list with repeated exposure to pairs of items ...