The real revelation, however, came from the men. Men considered a larger penis as an indicator of a rival with both greater ...

What did the first humans actually look like? This video traces our evolutionary story back to a tiny, squirrel-like primate that started it all. You’ll see how millions of years shaped the human face ...

Same-sex behavior is widespread in primates and may help strengthen social bonds and improve survival under challenging ...

OSTEEN, Fla. — In a trend on social media, people are showing off the pet monkeys they own, often to generate revenue for their animals. Owners are often forced to give up their monkeys because they ...

More than 59 different primate species have been observed participating in some kind of same-sex behaviors, making it ...

Sexual behaviour among same-sex pairs is common in apes and monkeys, and a wide-ranging analysis suggests it does boost ...

Bonobo evolution reveals bonding and group cohesion in response to threats, favoring paths to finding peace instead of ...

Add Yahoo as a preferred source to see more of our stories on Google. Twins are uncommon in human history. Tesla Monson Our recent research suggests that twins were actually the norm much further back ...

Tarsiers are among the smallest primates in the world, typically measuring just 10-15 centimeters (4-6 inches) in body length, with an additional tail length of about 20-25 centimeters (8-10 inches).

Why does a glass of wine make a holiday party feel more festive? It might be because our forebears used to party. Not the ancient Greeks, though they did name a god of wine. Go back even further than ...

This video uncovers six primate species whose behavior and appearance stretch the limits of what most people expect from the animal world. Scientists explain the peculiar adaptations behind their ...