A new study theorizes that evolution ticks at different speeds, especially when a big group of organisms first appears.

Our bones did not begin deep inside the body. They started in the skin, not long after the first complex animals took shape.

A uniquely preserved ichthyosaur from the Pliensbachian period helps resolve when a major evolutionary shift occurred among ...

For more than a century, biologists assumed that the bony plates embedded in the skin of lizards – like natural chain mail – ...

A new study from Bar-Ilan University shows that one of sleep's core functions originated hundreds of millions of years ago in ...

Homosexual behaviour in primates has a deep evolutionary basis and is more likely to occur in species that live in harsh ...

A reduced genome in an island species raises evolutionary questions.

This rainforest tree solved one of evolution’s hardest problems. Here’s how it evolved to use tension and geometry to fire ...

Learn how jellyfish and sea anemones are changing what we know about the evolutionary purpose of sleep.

The rapid evolution of many pathogens, particularly RNA viruses, means that their evolution and ecology occur on the same timescale, and therefore must be studied jointly to be fully understood. The ...