“We can say with some certainty that modern humans emerged in Africa a little over 200,000 years ago,” said Dr Elhaik.
“It is obvious that modern humans did not interbreed with hominins living over 500,000 years ago. It is also clear that there was no single ‘Adam’ and ‘Eve’ but rather groups of ‘Adams and ‘Eves’ living side by side and wandering together in our world.”
Source: http://www.sciencedaily.com/releases/2014/01/140122134148.htm