London, Oct 31: A study that has accurately dated sophisticated stone tools made by our ancestors has suggested that technological innovation is more likely to have spurred the first modern humans to migrate out of Africa than climate change.
Scientists have long argued about the forces that drove the transition to modern human behaviour after our species evolved in Africa up to 280,000 years ago.
Most scholars agree that Homo sapiens passed a threshold between 60,000 and 80,000 years ago, with evidence for more complex technology, ornaments and symbolic art turning up in the archaeological record.
Human genetics research also suggests that the population expanded markedly during this time.