Attirampakkam: Attirampakkam is an important Lower Paleolithic (Acheulean) archaeological site located in Attirampakkam village, Tiruvallur district, Tamil Nadu, on the banks of the Kortallaiyar River.

The site dates from approximately 1.5 million to 0.2 million years Before Present (BP), with the earliest Acheulean evidence securely dated to around 1.5 million years BP. It shows continuous occupation from the Lower Paleolithic into the Middle Paleolithic. The site was first discovered by Robert Bruce Foote in 1863.

Although no human fossils have been recovered, the stone tools are generally attributed to Homo erectus based on their age and technological characteristics. The site represents the Acheulean stone tool industry, yielding a rich assemblage of handaxes, cleavers, bifaces, flakes, scrapers, cores, and hammerstones, predominantly made from quartzite.

The ancient environment was a river floodplain with seasonal streams, providing suitable conditions for early human habitation. Faunal remains are limited, and plant evidence is sparse. Attirampakkam is renowned for providing one of the earliest securely dated Acheulean assemblages outside Africa, fundamentally changing our understanding of the timing of early human dispersal into South Asia.

It is regarded as one of India’s most significant Lower Paleolithic sites, serving as a benchmark for Indian Stone Age chronology and holding global importance for the study of early hominin migration and the evolution of Acheulean technology beyond Africa.