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

Fragments of the left side of the skull of a human relative have been discovered in Spain, revealing the face of the oldest human ancestor ever discovered in Western Europe.

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.