Hadar is a paleontological fossil site located in Mille district, of the Afar Region, Ethiopia, 15 km upstream (west) of the A1 road’s bridge across the Awash River (Adayitu kebele). It is situated on the southern edge of the Afar Triangle (part of East Africa’s Great Rift Valley), along the left banks of the Awash River, between two minor tributaries, the eponymous Kada Hadar and the Kada Gona. In 1972, Taieb organized a small exploratory reconnaissance of the Afar region to investigate more paleontological finds there. After six weeks of exploration, the party focused on the Hadar site.

The site has yielded some of the most well-known hominin fossils, including “Lucy”. These hominin fossils range in age from approximately 3.42 to 2.90 million years ago. These finds give us a greater understanding of hominin evolution during this period.