Six teeth roughly 400,000 years old have yielded some of the first ancient proteins thought to belong to Homo erectus, providing molecular clues to their relationships with other hominins

Genetic analysis suggests interbreeding between two groups of human relatives.

Palaeoproteomic analysis of ancient enamel proteins extracted from Middle Pleistocene Homo erectus specimens from the Zhoukoudian, Hexian and Sunjiadong sites in China suggests…