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The last ice age peaked 25,000 years ago. Since then the habitable reasons have continued to change. North Africa was much more livable; we can assume it was more heavily populated, in relative terms, than now. The Bible's diaspora is probably the retelling of a huge migration that occurred out of North Africa and the Middle East, as the climate changed. That could have happened quickly, and caused large shifts of population by boat and land from the Mediterranean to as far as East Asia and the Americas.

People as separated as the Japanese Ainu and Basques may share common Mediterranean roots and have become separated as a result of the post-ice age climate change.

We know that several waves of immigrants reached the Americas pre-Columbus (excuse me, pre-Colon). So, they came because of population pressure, and may have come across both the Atlantic and Pacific.

The web is full of interesting speculation about this. One article talked about possible linguistic relationship between the central Mexican Indian language Nahuatl, still spoken now, and which was spoken by the Aztecs (related to several North American Indian languages, including Hopi, I think). The speculation is that there is a connection between it and ancient Egyptian. The clue to "seeing" this is to regard the "l", that Nahuatl inserts in many places, as something of a conjunctive or article. When those "l"s are removed, the correspondence between Nahuatl and old Egyptian morphemes improves (a lot). Without passing any judgment on the contention, it is very interesting to contemplate, and dovetails nicely with the idea that the North African culture was forced to emigrate.

So, yes, this article is talking about probable events. But the "big" story involves a larger timeframe and more of the world's population.

"So, yes, this article is talking about probable events. But the "big" story involves a larger timeframe and more of the world's population."

Great overview, you do get it. There is a connection between the language of the Olmecs (Mexico) and the Chinese of the Shang Dynasty. It is written in Chinese records that at the time of the Shang Dynasty collapse (coinciding with a worldwide catastrophe recorded in the tree-rings in 1150's BC) that 250,000 Shang Chinese 'took to the sea.'

"People as separated as the Japanese Ainu and Basques may share common Mediterranean roots and have become separated as a result of the post-ice age climate change.

The Relationship Between The Basque And The Ainu

I believe it was the Ainu who migrated back to Europe.