All Comments on 'A Long Time from Home: World Map'

I do I have one comment. I always believed that Mauritania, Mali, southern Libya and Egypt and the Sudan were green not that long. An article published in 1998 indicates -- A sudden warming of climate lasting several centuries took place in equatorial Africa some 2,000 years ago, according to a new study reported by a Weizmann Institute of Science team. The scientists performed an isotopic analysis of the sediments from Hausberg Tarn, a small lake at an altitude of 4,350 meters on a slope of Mt. Kenya, a dormant volcano in East Africa whose top (at 4,600-4,700 meters) is covered by permanent glaciers. They found that a rapid and significant warming of lake water -- by about 4 degrees C -- took place between the years 350 BCE and 450 AD, reflecting a warming of climate in equatorial East Africa. Without any human involvement