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A long-held explanation for the spectacular diversity of fishes turns out to be wrong.

Viviane Callier, Contributor

The process of evolution helped shape jellyfish to move through the water using almost no energy.

Karin Heineman, ISTV Executive Producer

Clues hidden in leaf fossils reveal shift to vegetation that smolders rather than flares.

Emily DeMarco, Staff Writer

Large brains used to be an advantage, then humans happened.

Charles Q. Choi, Contributor

In whales -- and in humans -- older females seem to offer a special benefit to groups.

Katharine Gammon, Contributor

Sex differences in human travel behavior may have evolutionary roots.

Nala Rogers, Contributor

Humans may have evolved a visual spider “template” to warn us of danger.

Nala Rogers, Contributor

Study reveals how in distantly related species, smaller birds can win battles with larger ones.

Katharine Gammon, Contributor

Evolution of Galápagos feather lice tracks hawk hosts through space and time.

Patricia Waldron, Contributor

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