Fig. 2 (IMAGE) Institute for Basic Science Caption Top: Scatter plot showing time and latitude of sites with evidence of human occupation, middle: biome diversity associated with hominin sites, calculated using a moving average of 15 sites. Bottom: area roughness associated with hominin sites, calculated using a moving average of 15 sites. Gray shading shows the approximate timing of the Mid-Pleistocene Transition (MPT). 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.