Getting Smarter (IMAGE) Columbia Climate School Caption Key human traits including the ability to plan, work together and make tools, emerged as human ancestors adapted to a changing landscape. Here, a projectile point, age and makers unknown, lying on the ground in the Lake Turkana region of Kenya. Credit Kevin Krajick/Lamont-Doherty Earth Observatory Usage Restrictions Credit must be given. 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.