The structure and function of astronauts' arteries appear to remain stable and free of disease for as long as five years ...

A tiny, overlooked wrist bone called the pisiform may have played a pivotal role in bird flight and it turns out it evolved ...

In the long history of life on Earth, one of the biggest turning points came when our distant ancestors stood tall—literally.

The alderman who posted a photo of a human arm found in Illinois is running for Waukegan mayor. Sade Robinson's mom urges voters not to support him.