By Anthony Watts – Re-Blogged From http://www.WattsUpWithThat.com
It has been argued (unsuccessuly) that the current change in climate will cause millions to billions of “climate refugees”. Some of these claims have been so “over the top” that they were quietly withdrawn and swept under the rug. Here, we have a real case of climate refugees based on natural variation of the climate.
From the UNIVERSITY OF ARIZONA and the “natural variation before the SUV is wot dun it” department:
Ancient humans left Africa to escape drying climate
Humans migrated out of Africa as the climate shifted from wet to very dry about 60,000 years ago, according to research led by a University of Arizona geoscientist.