West Turkana, Kenya (IMAGE) Columbia Climate School Caption Study co-author, Craig Feibel, is among the team of researchers that returned in 2007 to West Turkana to put dates on hand axes excavated earlier. 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.