The Ice Age

Ice covered northern Europe, west to Siberia, and much of Canada. The climate was dryer and colder than now in the regions below the ice line, which maintained a substantial population of large herbivores, including mammoths, large carnivores, like sabre tooth tigers, and man. 

At lower latitudes, corresponding to presently arid regions as northern Mexico, the Sahara and the Mesopotamian-Caspian region, climatic conditions were wetter than now and probably favorable to cattle breeding and agriculture. In particular, the Sahara was a huge grassland, its mountains were forested, large lakes filled the depressions and great rivers were flowing, as has been spectacularly confirmed by radar photographs from the Shuttle. 

In western and central Asia the climate was favourable too, thanks also to the presence of a huge inner sea which enclosed the Black Sea (during the glaciations the Black Sea was not connected with the Mediterranean), the Caspian Sea and probably lake Aral, for an extension almost equal to that of the Mediterranean. 

Finally, heavy vegetation covered the Caribbean region, parts of central Africa and the Pacific regions of Asia and Australia from middle China to southern Australia. 

Courtesy of Emilio Spedicato, University of Bergamo (http://wwwesterni.unibg.it/maths/dynamics/apollo.html)