A tiger walks the same worn groove along the edge of its exhibit, like a broken record. A parrot methodically plucks out its own feathers until bare skin shows through. To a casual visitor, these can ...

Add Yahoo as a preferred source to see more of our stories on Google. Japanese macaques at Joshin-etsu National Park in Japan. (Peter Adams / Getty Images file) (Peter Adams) Humans are far from the ...

For humans, feces are last on the list of things we’d place near our mouth. In the animal world, that reaction does not ...

A perspective in the Journal of the Royal Society Interface argues that advances in AI, sensing technologies and modeling are ...

What is a kiss? To a scientist it is “oral to oral contact with mouth movement without food transfer .” Doesn’t that sound ...

A new study comparing 59 species of primates linked same-sex sexual behavior to scarce resources and more predators in socially complex species. The findings show diverse sexual behaviors are common — ...

Same-sex behavior is common across the animal kingdom—more than 1,500 species are estimated to have been observed engaging in same-sex behavior, from spiders and nematodes to bonobos and fish. Still, ...

Rare observations show Atlantic puffins holding sticks to reach itchy spots, suggesting tool-like behavior beyond nest ...

Sealed surfaces, artificial light and constant noise: What is part of everyday life for humans poses major challenges for other animals. A new international review conducted by researchers from ...

Detail that zoochosis can come from a variety of factors, including social isolation, small enclosures, noisy visitors, and lack of enrichment. Explore how zoos are working to reduce zoochosis through ...

Humans are far from the only primates engaging in same-sex sexual activity. A new study found instances in which 59 nonhuman primate species, including bonobos, chimpanzees and macaques, have taken ...