Scarcer food may have pushed early humans to rework stone tools for longer use

About 300,000 years ago, the emergence of the first Homo sapiens in Africa was accompanied by major cultural and technological changes, marking the beginning of a new archaeological period, the Middle Stone Age. At that time, African landscapes were also undergoing profound transformations. To understand how the earliest members of our species lived and adapted, it is therefore essential to reconstruct the environments in which they lived.