Kokiselei, Kenya (IMAGE) Columbia Climate School Caption Tools made by early humans were found at Kokiselei, Kenya, in Lake Turkana's ancient shoreline sediments pictured above. Credit Lamont-Doherty Earth Observatory 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.