Fig. 1 (IMAGE) Institute for Basic Science Caption North Atlantic cooling event 1.127 million years ago, which contributed to the depopulation of Southern Europe. (Photo credit Homo erectus skull, Axel Timmermann). Pink shading in map highlights areas, where early human species suffered a major reduction in habitat suitability due to cooling, drying and reduction in food resources. Credit Institute for Basic Science Usage Restrictions Attribution Required License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.