Migration Paths (IMAGE) Max-Planck-Gesellschaft Caption The migration paths taken by modern man as he colonized the world. 60,000 years ago, Homo sapiens left his original home in East Africa -- taking the bacterium Helicobacter pylori with him. The abbreviation "kyears" stands for thousand years. Credit Max Planck Institute for Infection Biology 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.