Acheaulean is the name given to an archaeological industry of stone tool manufacture associated with prehistoric hominids during the Lower Paleolithic era, extending across Africa and much of Asia and Europe. It was the dominant technology for the vast majority of human history and more than 1,000,000 years ago it was Acheulean tool users who left Africa to first successfully colonize Eurasia. Their distinctive oval and pear-shaped handaxes have been found over a wide area and some examples attained a very high level of sophistication, suggesting that the roots of human art, economy and social organisation arose as a result of their development. Although it developed in Africa, the industry is named after the type site of Saint Acheul, now a suburb of Amiens in northern France, where some of the first examples were identified in the nineteenth century.