From a Wolpoff article in Scientific American:
If a worldwide invasion and complete replacement of all native peoples by Eve's descendants actually took place we would expect to find at least some archeological traces of the behaviors that made them successful. Yet examining the archeology of Asia, we can find none. For instance, whereas, the hand axe was a very common artifact in Africa, the technologies of eastern Asia did not include that technology either before or after the Eve peiod.
Just one important fact to muddy the OOA hypothesis...
True enough. But his 4/5 lines of H. erectus merging into single H. sapiens sapiens didn't appeal to many. And the (undeserved IMO) charges of racism prompted folks like Gooch and Wolpoff to revise it.
So far the most promising evidence is the remains of 'Portugal boy', showing charateristics of neaderthal and modern saipens. However a sapiens x neanderthal hybrid explains this find better than an erectus x neaderthal off-spring.
For instance, whereas, the hand axe was a very common artifact in Africa, the technologies of eastern Asia did not include that technology either before or after the Eve peiod.
-- Dr. Wolpoff - article in Scientific American
"The Acheulian tradition of tool making spread from Africa into Southwest Asia by 1.4 million years ago and reached southern Europe by at least 600,000 years ago. Until recently, the lack of hand axes at Zhoukoudian and other East Asian Homo erectus sites suggested that the Acheulian tradition did not reach that far. It was thought likely that the same functions that hand axes performed in the west were being performed in the far East by other kinds of tools, perhaps made of bamboo. However, 24 sites in Southern China have now been found to contain Acheulian hand axes dating back about 800,000 years."-- Early Human Culture - Tool Making
"On December 6, 2005, an opening ceremony for an international symposium on The Palaeolithic Archaeology in Baise Basin and the Early Human Migrations and Evolutions in the Old Word was held at Baise City, Guangxi Zhuang Autonomous Region, China. This symposium has invited more than 40 distinguished specialists from Britain, France, United States, German, South Africa, Spain, Israel, India and China.-- The Palaeolithic Archaeology in Baise Basin and the Early Human Migrations and Evolutions in the Old Word
Since its first discovery in 1973, the Palaeolithic stone tools in Baise, particularly the so-called Baise handaxe, have drawn broad attentions from scholars worldwide. Excavations were conducted in the 1980s, followed by multi-disciplinary research projects in the 1990s. Among the challenging academic issues are the early hominids and their cultural features in the Old World, the formation process of red earth in south China, environmental changes, and the living environment of early humans. ..."