Researchers have discovered the jawbone of what they claim is of the very first humans, BBC reports.
The 2.8 million-year-old specimen discovered in Ethiopia is 400,000 years older than researchers thought that our kind first emerged.
Scientist further suggested that climate change may have spurred the transition from tree dweller to upright walker.
The head of the research team told BBC News that the find gives the first insight into “the most important transitions in human evolution”.
According to experts, the dating of the jawbone might help answer one of the key questions in human evolution, like what caused some primitive ancestors to climb down from the trees and make their homes on the ground?
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