"Out of Africa" Theory Called Into Question By Originator

Reality is more complex than humans just appearing in one location in Africa? That doesn't really question ANYTHING about the theory, but instead just suggests a refinement.

There are multiple theories that really are different

1) H. Sapiens evolved in Africa, travelled from there, overtaking and outcompeting (or outright killing) previous hominids who earlier left Africa.

2) A mostly-modern H. Sapiens evolved in Africa, travelled from there, and interbred with/absorbed existing hominid populations (by some definitions these were also H. Sapiens) who had earlier left Africa. This one isn't so different, but it is different.

3) Multiregional. Earlier hominids (not H. Sapiens) leave Africa in multiple expansions. These various groups evolve, run into each other, and interbreed, and continue migrating (including back to Africa). H. Sapiens emerges as a product of this global interbreeding and evolution. This is obviously a very different theory.

Evidence of modern humans having some Neanderthal and Denisovan DNA casts a lot of doubt on the first theory.

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/0woljAF8mN8/out-of-africa-theory-called-into-question-by-originator

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