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Sorry meant Olduvai Gorge 1.6 million years http://en.wikipedia.org/wiki/Olduvai_Gorge > Adrian wrote: > > I thought it was a lot longer for sentience > maybe more than a million years ? > How old is Orduvai Gorge hominids - > suppose you ask what are the signs of thought - decoration - > collection of objects such as fossils - > burial rites. > > Civilization - this one about 10,000 years - > > Mogg > > >> I'm not an academic in ancient history but has a thirst to understand >> the time scales of existence of sentient humans and the age of human >> civilisation. What bids do we have to how far back we can stretch >> human existence? Can we support perhaps 100,000 years? >> >> I'd be interested in the thoughts from the list to support or refute >> such a timescale; indeed do any bids exceed 100,000 years of >> conscious mankind? >> >> Best wishes >> >> Adrian >> > >