The prehistoric facial bones were found buried in 50 feet of mud and silt, and are believed to be 1.1 to 1.4 million years old, researchers said.

A groundbreaking discovery in the Sima del Elefante cave, located in the Atapuerca mountains of Spain, is changing what we know about the first humans in Western Europe. Researchers have identified a 1.

The upper jawbone and partial cheek bone represent a mysterious unknown species that lived in present-day Spain between 1.1 million and 1.4 million years ago, according to a new study