Monkey Migration Out of the Amazon Basin (IMAGE) Duke University Caption As climate and sea levels fluctuated, monkeys dispersed out of the Amazon Basin and evolved in their new ranges. The black outlines represent present-day landmasses, while green and yellow shading represents lowland and highland landmasses during the Late Oligocene and Early Miocene. Credit Richard Kay, Duke University Usage Restrictions None License Licensed 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.