Researchers observed chimpanzees in the forests of Bossou, Guinea, noting that these primates use two tools to crack nuts: a ...

Early stone ... evolution. The Oldowan stone tools from Hadar, Ethiopia, are among the oldest known, dating back 2.3 million years. Shown from various angles are (a) two sharp-edged flakes and (b ...

An international team of paleobiologists, anthropologists and behavioral scientists has found that the process used by modern ...

With this data in hand ... emergence of stone tool technology represents — in hindsight — a momentous step in human evolution (Figure 2). With sharp flakes and simple core tools, early ...

Around 300,000 years ago, they began to shape stone cores from flint that they could carry as a kind of toolkit. They would strike off flakes from this portable core and skilfully turn them into tools ...

Early humans were in the area for about 700,000 years, making large hand axes from nearby stone, explained Dr ... a very rapid period of evolution." New tools appeared at this time - small ...