I'm not an expert, but I think you're referring to only one part of our lineage. Neanderthals, Denisovans etc. are also ancestral species for most of us and I don't believe they originated in Africa, did they?
No, it's not. There's an enormous amount of fossil evidence now that humans evolved in Africa and radiated from there. There's also the genetic evidence that has solidified the already pretty iron clad evidence.
I don't understand why migrating humans seems to surprise anyone. With stone-age technology, people can walk across a continent within a lifetime or sail across an ocean (Polynesians). What obstacles would have stopped million-year old pre-humans? Could it be they were travelling all over the world quite often but many of them ended up not leaving any descendants or fossils?
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[ 4.5 ms ] story [ 15.5 ms ] threadThis find may mean the prevailing out of Africa theory is more likely than another, less common out of Africa theory.
TLDR: out of Africa is the only theory anyone takes seriously and this doesn't change that.
- Non-homo sapien hominids (Neanderthals etc)
- Homo sapiens 1.5M years ago
- Homo sapiens a few hundred thousand years ago