Prehistoric Climate Change Repeatedly Channelled Human Migrations Across Arabia https://www.mpg.de/17408259/prehistoric-climate-change-repeatedly-channelled-human-migrations-across-arabia
International and Saudi researchers have discovered archaeological sites in the Nefud Desert of Saudi Arabia associated with the remains of ancient lakes formed when periods of increased rainfall transformed the region into grassland. The researchers found that early humans spread into the region during each ‘Green Arabia’ phase, each bringing a different kind of material culture. The new research establishes northern Arabia as a crucial migration route and a crossroads for early humans.
– this is associated with economic costs and the climate continues to heat up Amazon