Top_image (IMAGE) Aarhus University Caption Homo erectus – which this skull belonged to – was the first hominin species to leave Africa, around 2.1 million years ago. New research shows that when Homo erectus migrated from Africa the climate was wetter and more vegetated in the northeastern part of the continent than it is today. Climate cycles coincided to create a green corridor that our early ancestors probably took advantage of in their migration. Credit Mizmareck / Flickr Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.