RT Journal Article T1 The Origin of The Acheulean: The 1.7 Million-Year-Old Site of FLK West, Olduvai Gorge (Tanzania) A1 Díez Martín, Fernando A1 Sánchez Yustos, Policarpo A1 Baquedano, Enrique A1 Uribelarrea Del Val, David A1 Mark, Darren F. A1 Mabulla, Audax Z. P. A1 Fraile, Cristina A1 Duque, Javier A1 Díaz Muñoz, Isabel M. A1 Pérez González, Alfredo José A1 Yravedra Sainz De Los Terreros, José A1 Egeland, Charles Peter A1 Organista, Elia A1 Domínguez-Rodrigo, Manuel AB The appearance of the acheulean is one of the hallmarks of human evolution. It represents the emergence of a complex behavior, expressed in the recurrent manufacture of large-sized tools, with standardized forms, implying more advance forethought and planning by hominins than those required by the precedent Oldowan technology. The earliest known evidence of this technology dates back to c. 1.7 Ma. and is limited to two sites (Kokiselei [Kenya] and Konso [Ethiopia]), both of which lack functionally-associated fauna. The functionality of these earliest Acheulean assemblages remains unknown. Here we present the discovery of another early Acheulean site also dating to c. 1.7 Ma from Olduvai Gorge. This site provides evidence of the earliest steps in developing the Acheulean technology and is the oldest acheulean site in which stone tools occur spatially and functionally associated with the exploitation of fauna. Simple and elaborate large-cutting tools (LCT) and bifacial handaxes co-exist at FLK West, showing that complex cognition was present from the earliest stages of the acheulean. Here we provide a detailed technological study and evidence of the use of these tools on the butchery and consumption of fauna, probably by early Homo erectus sensu lato. PB Nature Research SN 2045-2322 YR 2015 FD 2015-12 LK https://hdl.handle.net/20.500.14352/23825 UL https://hdl.handle.net/20.500.14352/23825 LA eng NO Ministerio de Economia y Competitividad (MINECO) NO Ministerio de Cultura DS Docta Complutense RD 12 abr 2025