Scientists have documented same-sex behavior in many animals. Learn what it means, how it varies, and why human labels can mislead.

It may be the way they look or the way they behave – the end result is that they are truly fascinating. It may be the way ...

A newly discovered millipede species found in a Thailand cave looks like something from a fantasy novel—and it’s completely real.

Some of the most photographed animals carry venom, crushing force, disease risk, or defensive reactions that escalate in seconds when stress appears. Across coasts, forests, wetlands, and city-edge ...

Redd’s daily treatment reveals how orangutans with chronic respiratory diseases are adapting to use certain medical tools designed for humans. Mike Bock Redd, left, and his mother, Batang, right. Both ...

A pod of Pacific white-sided dolphins off the coast of British Columbia have been observed cooperating with orcas, a traditional enemy that’s better known for taking out great white sharks than ...

The calf was born on Oct. 29, but he “began to decline rapidly” three days later on Nov. 1, according to the zoo “Every effort was made to intervene and improve the dolphin’s chances of survival, but ...

Brookfield Zoo Chicago is unveiling a new chapter in one of its most beloved attractions. Beginning Oct. 4, guests can experience Dolphin Discovery, a newly reimagined show at the zoo’s renamed ...

CHICAGO — A bottlenose dolphin at a Chicago zoo gave birth to a calf over the weekend with the help of a fellow mom, in a successful birth recorded on video by zoo staff. The dolphin calf was born at ...

A sudden spate of dolphin deaths on Oahu in Hawaii has raised concerns among scientists who have confirmed the presence of Brucella ceti, a marine strain of bacteria that can be transmitted to humans.

WASHINGTON — Brookfield Zoo Chicago is mourning the sudden death of its four-day-old bottlenose dolphin calf. The male bottlenose dolphin was the first born at the facility in over a decade. According ...