One of the biggest quests in biology is understanding how every cell in an animal's body carries an identical genome yet ...

A variety of studies are showing that rough-and-tumble play is important for animals and kids alike.

A biologist explains the surprising evolutionary math behind how the blue whale became the largest animal that has ever lived ...

Once upon a time, there were a bunch of one-celled microbes, swimming, eating, reproducing, doing all the things that a one-cell bit of life can do. Then, some time later, there were their descendants ...

Evolution is slow, but with the right experimental set-up—and enough time to spare—you can watch nature do its methodical ...

Researchers find Apennine brown bears evolved into a smaller, less aggressive animal after centuries of coexistence with ...

Evolution is a continuous, powerful force shaping the natural world around us. As environmental pressures intensify, future animal evolution is likely to produce fascinating and sometimes bizarre new ...

Learn how mapping gene-control switches in an ancient sea anemone reveals how identical DNA can produce many different cell ...

An artist’s impression depicts Kryoryctes at Dinosaur Cove in Australia. New research supports the hypothesis that Kryoryctes is a common ancestor of both the platypus and echidna. - Peter Schouten ...

A microorganism whose evolutionary roots can be traced to the era of the first multicellular animals may provide a glimpse of how single-celled organisms made a critical evolutionary leap. In ...

In five cases where vertebrates evolved monogamy, the same changes in gene expression occurred each time. In many non-monogamous species, females provide all or most of the offspring care. In ...

To understand the origins of multicelled life, researchers are studying a motley assortment of simpler animal relatives. The commonalities they’re unearthing offer a trove of clues about our mutual ...