This is a confusing topic. For example:
http://donsmaps.com/mungo.html"The comprehensive study of 25 different sediment layers at Mungo - a collaboration between four universities, the CSIRO, and NSW National Parks and Wildlife and led by Bowler - concludes that both graves are 40,000 years old. This is much younger than the 62,000 years Mungo Man was attributed with in 1999 by a team led by Professor Alan Thorne, of the Australian National University."
"Now, however, Thorne says the age of Mungo Man is irrelevant to this origins debate. Recent fossils finds show modern humans were in China 110,000 years ago. "So he has got a long time to turn up in Australia. It doesn't matter if he is 40,000 or 60,000 years old." "
Compare that with:
http://www.eurekalert.org/pub_releases/2007-04/wuis-cem040207.php"The skeleton [in China] dates to 42,000 to 38,500 years ago, making it the oldest securely dated modern human skeleton in China and one of the oldest modern human fossils in eastern Eurasia."
Also, looking through the websites, I find conflicting affirmations of the time of the migration out of Africa. Some, like the one Mike quoted (which appears in Science Daily), say 55,000 to 65,000 years ago, while others say 70,000 and one (above) says that modern humans were already in China 110,000 years ago!
