The Out of Africa one. It might not have been quite that simple because Arabia was not always a desert.
Commenting on evidence that early humans were active in once-lush Arabia (8000 years ago), which science writer Michael Marshall offers, at New Scientist, “The other cradle of humanity: How Arabia shaped human evolution,” at Creation-Evolution Headlines, Dave Coppedge summarizes:
So how wrong was the old story? Let us count the ways:
Humans did not bypass the interior of Arabia; they went right through the middle of it.
People groups stayed in Arabia for substantial periods of time, building monuments.
The monuments they built showed evidence of complex social structures, just like all people groups exhibit.
The monuments, Darwin dated at 7,000 years, are older than Stonehenge and the Pyramids.
Arabia was not a place without human history. Recently-found artwork and petroglyphs prove it.
The interior of Arabia is nearly uninhabitable today, but was a good place to live a few thousands of years ago.
Hippo bones have been found in former lake beds under the sand. Hippos need permanent water meters deep.
Evidence of fertile grasslands, abundant wild game, elephants and water birds has also been found.
Stone tools are found in Arabia resembling those in deep Africa.
All the “hominins” were people. “My guess is we’re going to be looking at a whole variety of potentially different hominin species, almost all of whom could probably interbreed,” says another Darwin bigot. If they could interbreed, they were all part of the human species.David F. Coppedge, “Arabian Artifacts Undermine Human Evolution Narrative” at Creation–Evolution Headlines (August 19, 2021)
Yes, that human “species interbreeding” stuff nags at some of the rest of us too. But maybe a Darwinist needs to think that way.
Anyway, Arabian sands may preserve many of our ancestors’ artifacts. We always say, keep digging.
You may also wish to read: Human evolution at your fingertips