A new study tracing the evolution of same-sex sexual behavior in mammals, using phylogenetic analyses, suggests these behaviors may have evolved in part to strengthen social bonding and relationships.

During the first few years of the COVID-19 pandemic, the virus SARS-CoV-2 was detected in an increasing number of non-human animal species. This included many wild animal species as well as domestic ...

Animals survive in changing and unpredictable environments by not merely responding to new circumstances, but also, like humans, by forming inferences about their surroundings—for instance, squirrels ...

A recent study finds that color vision evolved in animals more than 100 million years before the emergence of colorful fruits and flowers. And there has been a dramatic explosion of color signals in ...

The 550-million-year-old fossil Tribrachidium heraldicum is one of the most enigmatic critters from the Ediacaran. With its circular, three-lobe form, it doesn't resemble any modern organism. The ...

(CNN) — Same-sex sexual behavior has been observed in more than 1,500 animal species, but a new study has found that it is massively underreported by researchers. Observations of this same-sex ...

Advances in organ and computer models are raising the prospect that some animal experiments could be eliminated. But there ...

What is the 'most Canadian' animal? Spoiler: it's not the beaver, or the moose. A new study ranks species of terrestrial vertebrates in Canada by their level of Canadian evolutionary distinctness: the ...

File: Decomposing food scraps at Bennett Compost in Northeast Philadelphia. (Kimberly Paynter/WHYY) This story is part of the WHYY News Climate Desk, bringing you news and solutions for our changing ...