It's not easy to look at a sea spider and see an animal so representative of its kind that it may help scientists sort out ...

Animals, from worms and sponges to jellyfish and whales, contain anywhere from a few thousand to tens of trillions of nearly ...

These animals evolved to be ‘ultrablack’—here’s why. An ant that disappears into the forest floor, a bird that demands attention from mates—for these animals, an inky black exterior is ...

We know that some animals are bilaterian—meaning they display bilateral symmetry—while others are not, but nature is rarely ...

A new study suggests the platypus and echidna — the only egg-laying mammals — had a water-dwelling ancestor. The finding could upend what’s known of their evolution.

Some animals seem to appreciate music. What does that mean for human evolution? The ability to keep a beat was once thought to be uniquely human.

The findings of a new study "clearly show that interfering with the environment has a detectable effect on wildlife," a ...

Scientists in Chicago are mapping some fascinating evolutionary changes to local rodents — and how humans may have ...

For decades, scientists have studied animals living in or near the Chernobyl Nuclear Power Plant to see how increased levels of radiation affect their health, growth, and evolution. A study analyzed ...

Water and air pose completely different challenges to animals on a number of levels.