Acheulian stone tools which is about 1.51 million years old, have been discovered in Chennai near Attirampakkam. These stones were found by researchers from the Chennai-based Sharma Centre for Heritage Education.
The discovery indicates that early humans (hominins), used these tools. The tools are much older than those found in Europe. These tools are also found in several countries in South Asia, including India, Nepal, and Pakistan.
More than hundreds of different tools have been discovered from the Attirampakkam site. The most common ones are hand-axes, cleavers and small flakes. The stone axes are elongated teardrop or ovate-shaped with bifacial symmetry.
Unlike the hand-axes, the cleavers have broad cutting edges.