Early fossils with guts, segmented bodies and other sophisticated features reveal a revolution in animal life — before the Cambrian explosion. The revolutionary animal lived and died in the muck. In ...

Bizarre Ancient Species Are Rewriting Animal Evolution | RealClearScienceThe revolutionary animal lived and died in the muck. In its final hours, it inched across the sea floor, leaving a track like a ...

When people build cities and introduce invasive creatures, resident critter populations sometimes adapt Brian Handwerk - Science Correspondent When humans build cities and introduce invasive species, ...

Some 390 million years ago in the ancient ocean, marine animals began colonizing depths previously uninhabited. New research indicates this underwater migration occurred in response to a permanent ...

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 ...

The fossils of ancient salamander-like creatures in Scotland are among the most well-preserved examples of early stem tetrapods -- some of the first animals to make the transition from water to land.

Rapid climate changes over the past several decades have led to heritable, genetic changes in animals as diverse as squirrels, birds and mosquitoes, according to University of Oregon evolutionary ...

Most animals we know - mammals, birds, and reptiles, have bones that shape and support their bodies. Yet, many of Earth’s ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The story of two of ...

Scientists believe they have pinpointed our most distant animal relative in the tree of life and, in doing so, have resolved an ongoing debate. Their work finds strong evidence that sponges - not more ...