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Small-Scale Question Sunday for January 22, 2023

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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Did the path taken from africa to europe really pass into 'cold winter' areas? Africa -> the Levant -> Turkey -> Greece ends in europe without passing through any places that even really receive snow.

Europe itself was the cold winter area, leading to a population bottleneck. Pop-sci link.

The more dubious and interesting question would the Middle East and India. It's worth noting though that populations do not move in a linear direction, and those regions have at various points gotten heavy admixture and even outright population replacement from the north -- especially after 3500 BC or so.

If so, why aren't i.e. Zulus as high average IQ as white europeans, considering their ancestors would have had to make similar migrations?

I'm completely ignorant of Zulu history, but I'm not really seeing devastating unsurvivable winters anywhere along the migration path. As for the temperature on the highlands and mountains I'm assuming they would descend for winters like foragers, nomadic farmers, and pastoralists have throughout history. Are there any mountain ranges that would take multiple years to cross to South Africa? How was the ice age in middle Africa, I thought pretty mild?

And furthermore, 'cold winters' aren't the only source of long famines. Couldn't there be plenty of (and different types of) causes of famines in the tropical parts of africa to encourage selection toward individuals capable of long-term planning?

Maybe. I'd be interested in seeing if there was a population bottleneck akin to what happened in Europe above.