15 March 2018
Humans may have developed advanced social behaviours and trade 100,000 years earlier than previously thought.
The results come from an archaeological site in Kenya's rift valley. "Over one million years of time" is represented at the site, according to Rick Potts from the Smithsonian Institution, who was involved in the studies.
There are also signs of developments in toolmaking technologies.
Environmental change may have been a key influence in this evolution of early Homo sapiens in the region of the Olorgesailie dig site.