Kakapel (IMAGE) Washington University in St. Louis Caption Located in the foothills of Mount Elgon near the Kenya-Uganda border, Kakapel Rockshelter is the site where WashU archaeologist Natalie Mueller and her collaborators have uncovered the earliest evidence for plant farming in east Africa. Credit Steven Goldstein Usage Restrictions For editorial purposes 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.