Geologically, Sri Lanka is an extension of peninsular India that separated from the mainland perhaps as recently as the Miocene Epoch (roughly 25 to 5 million years ago). Archaeological excavations undertaken since the late 20th century have indicated that the island already supported human inhabitants some 75,000 to 125,000 years ago. The artifacts from this era, which include many microlights (very small, sharp flakes of stone that can be used individually or hated together to make a serrated edge), have been found throughout the country, especially among the grasslands of the hills and the sandy tracts of the coast
Sri Lanka has more than 180 Pre Historic sites, with many cave excavations have retailed with pre historic barriers, the Fa sien cave in Yatagampitiya near Bulathsinhala in the tdistrict of Kalutara had 6 burials including children and infants.
Beli Lena , 8 Km from Kitulgala has remains of several prehistoric hearths and found along seeds of wild banana , Kekuna and wild breadfruit , the remain indicate that the Beli Len man has baked the bread fruit.
There are many Pre Historic Sitess such as Batadomba Lena site near Kuruwita Ratnapuara, Aligala Site near Sigiriya Dambulla, Remains of Prehistoric tools excavated from Eastern Coast and Bundala and Hambantota Coasts.