Mummified mice found atop volcanoes in South America have long hinted that rodents forage on peaks as tall as 22,000 feet, but it turns out mice permanently live at these extreme heights. When you ...

The coelacanth is known as a "living fossil" because its anatomy has changed little in the last 65 million years. Despite being one of the most studied fish in history, it continues to reveal new ...

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Researchers report that ancient viruses may be to thank for myelin -- and, by extension, our large, complex brains. The team found that a retrovirus-derived genetic element or 'retrotransposon' is ...

Because we're a member of the group, it's easy to see vertebrates as the pinnacle of evolution, a group capable of producing bats, birds, and giant whales in addition to ourselves. But when they first ...