Prehistoric animals once roamed — and ruled — planet Earth. Some of them, like the giant sloth or the woolly rhino, were generally gentle. Others, like the saber-toothed tiger and the dire ...

When University of Pisa paleontologists first found a prehistoric whale's skeleton 13 years ago among rocks in southern ...

Polar bears are one of the largest surviving prehistoric animals. Their existence is deeply connected to the health of polar ecosystems.