books.google.co.uk - 20,000 B.C., the peak of the last ice age--the atmosphere is heavy with dust, deserts, and glaciers span vast regions, and people, if they survive at all, exist in small, mobile groups, facing the threat of extinction.But these people live on the brink of seismic change--10,000 years of climate shifts...http://books.google.co.uk/books/about/After_the_Ice.html?id=NVygmardAA4C&utm_source=gb-gplus-shareAfter the Ice
