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The oldest known stone tools have been excavated from several sites at Gona, Ethiopia, on the sediments of the paleo-Awash River, which serve to date them.All the tools come from the Busidama Formation, which lies above a disconformity, or missing layer, which would have been from 2.9-2.7 mya.The rift served as a conduit for movement into southern Africa and also north down the Nile into North Africa and through the continuation of the rift in the Levant to the vast grasslands of Asia.

Dr Pachauri, the chairman of the UN’s Intergovernmental Panel on Climate Change, said that open discussion about controversial science and politically incorrect views was an essential part of tackling climate change. no issues should be off-limits for public discussion.” Dr Pachauri said that people had the right to question the science, whatever their motivations.They won’t make the mistake of making actual predictions again after they failed so badly in 1990.Now they predict warming, cooling, blizzards, droughts and unwarming. After years of making out that skeptics are “flat-earth-deniers who use voo-doo science“, Pachauri now reverses onto another track (did you know Pachauri is a railway engineer?The Stone Age is a broad prehistoric period during which stone was widely used to make implements with a sharp edge, a point, or a percussion surface.The period lasted roughly 3.4 million years, and ended between 4500 BC and 2000 BC with the advent of metalworking.

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