New Evidence for Early Human Tools
Plant fossils and isotopic records show Kenya’s landscape shifted from wetlands to grasslands around 2.8 million years ago.
Archaeologists found 1,300 artifacts in a 46-meter sediment record, dated using argon-argon, paleomagnetism, and microfossils.
Study challenges assumptions that tool use began later with larger brains between 2.4–2.2 million years ago.
Cut-mark evidence on bones links tools to meat consumption, showing broadened diets during climate shifts.
5 hours ago