On discovering some of historical sites like the Gademotto Formation, researchers found that the development of modern human brain started to about 280,000 years ago. Earlier, it was believed that human ancestors started developing modern brain at about 200,000 years ago.

The research provides direct evidence for a highly advantageous, complex technology which was used before the emergence of Homo sapiens.

Several sites associated with origin of hominids, subgroups of Homo sapiens, have also been found by the researchers at the Gademotto Formation. Karl Hutchings is an assistant Professor in sociology and anthropology at Thompson Rivers University in Kamloops, B.C. and also the only person interested in doing necessary archeological analysis.

Hutchings said that he uses sound waves and measurements to find out more about breaking of stones by humans and to determine how they were made and for what purpose these stones were used. He analyzed more than 200 javelin-shaped obsidian projectiles and fractures in the stone at the site along volcano crater in Ethiopia's Rift Valley.

The archeologists and anthropologists are of the view that the length of time illustrates the fact that by how much earlier our ancestors began using their brains to develop basic skills.

Hutchings concluded that the fractures in the stones are different based on the objects that were either thrown or used as a hand tool.