University College London repository - Spoor, F; Leakey, L; Leakey, M; (2002) A comparative study of Pliocene hominin fossils from Lomekwi, west of Lake Turkana (Kenya). In: AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY (Full text is not available from the UCL repository) Stone tools may have been used before our genus came on the scene, The Washington Post List of stone tools and their 3D-model