Animal life began in aquatic environments more than 600 million years ago. Around 500 million years ago, during the Cambrian ...

Eagles are one of the most impressive raptors in the world, and their reputation rests on speed, mating rituals, and hunting ...

Most of us walk through the world with a fairly confident mental map of which animals to fear. Sharks, yes. Crocodiles, ...

Before Lincoln Park Zoo's Kapuki had her rhino calf, matchmakers had to find a father. The male, brought in from Ohio, called ...

One day in June 2015, primatologist Aaron Sandel was watching chimpanzees in Uganda’s Kibale National Park when he saw something that did not make sense. A small party of chimps from the Ngogo ...

Hundreds of volunteers have joined a "Frog Patrol" initiative in a forest near the Polish capital of Warsaw to help ...

More than 40% of traded mammal species share at least one pathogen with humans, compared with only 6% of non-traded mammals.

Decades of data reveal that animals involved in the wildlife trade—from pet sales to meat markets to illegal poaching—are ...

New research shows female baboons influence fertilization through immune and chemical changes that affect sperm survival.

The hectocotylus is both a reproductive and sensory organ, Harvard scientists and others have found. Octopuses are some of ...

As humpback whale numbers climb back after decades of large-scale hunting, scientists are spotting strange things. A new ...

Whether they're offering gifts, courting for weeks or dying during sex, these are the romantic animal species doing courtship ...