What if, for whatever reason, humans across the globe invented civilization 20,000 years later than OTL? Limited agriculture, nomadic pastoralism, and the like are still okay. Particularly pastoralism. Making simple pots or cave paintings is also allowed.
With Native Americans/Paleo-Indians having more time to adapt to new latitudes, how would they look? Would there be 'black' and 'white' natives of the New World? What animals might they domesticate with 'extra time'?
Would the Indo-Europeans spread farther east and north (probably not any farther south)?
Would, after acquiring lactose tolerance from the Indo-Europeans or evolving it by themselves, the Afro-Semites spread into the arid areas of North Africa and the Middle East without any need for a Caliphate?
What else might occur?
With Native Americans/Paleo-Indians having more time to adapt to new latitudes, how would they look? Would there be 'black' and 'white' natives of the New World? What animals might they domesticate with 'extra time'?
Would the Indo-Europeans spread farther east and north (probably not any farther south)?
Would, after acquiring lactose tolerance from the Indo-Europeans or evolving it by themselves, the Afro-Semites spread into the arid areas of North Africa and the Middle East without any need for a Caliphate?
What else might occur?