Beginning more than 1.5 million years ago, early humans made stone handaxes in a style known as the Acheulean - the longest lasting tool-making tradition in prehistory. New research has documented an Acheulean presence in the Arabian Peninsula dating to less than 190,000 years ago, revealing that the Arabian Acheulean ended just before or at the same time as the earliest Homo sapiens dispersals into the region.