Speaking at the Chennai Maadham Festival, Pappu said Acheulean culture is believed to be “not very old in India”. However, their multidisciplinary research in Attirampakkam, which can be dated to the Middle and Lower Palaeolithic cultures, resulted in some fascinating revelations, she added. “We have been conducting this research since 1999, to study the prehistoric past of Tamil Nadu, using a combination of archaeology and chronology. Attirampakkam is one of the oldest prehistoric Acheulean sites in South Asia. We are looking at the stone tools designed by the Homo erectus, who were a different species altogether and are now extinct. The climate change through this area is being studied, to build mass monsoon and vegetation platters, interpret the period of extreme humidity and aridity in the past and see how these species adapted to the changes, over time,” she explained.