A continuous record in stone
In the tropical rainforests of Sri Lanka, a collection of rock shelters and caves is one of South Asia's most complete records of early human history. Sites like Batadomba-lena and Fa Hien-lena show evidence of occupation by anatomically modern humans from as early as 45,000 to 37,000 years ago. These early inhabitants were hunter-gatherers who adapted successfully to the challenging rainforest environment. The archaeological layers in these caves are deep, preserving a long sequence of stone tools, animal remains, and even human fossils.
The primary raw material for stone tool production was quartz, likely collected as river pebbles from nearby streams. The earliest toolkits include a technology known as microliths—small, shaped stone flakes. These miniaturized tools, some older than 34,000 years, represent some of the earliest evidence for such technology in South Asia. Microliths were not used alone; they were component parts of composite tools. Archaeologists believe they were hafted onto shafts of wood or bone to create projectile weapons like arrows or darts. This technology was essential for hunting the fast-moving, tree-dwelling animals of the rainforest. The stone tool technology at sites like Fa Hien-lena remained remarkably stable for tens of thousands of years, from its appearance around 45,000 years ago until about 4,000 years ago, indicating a successful and persistent adaptation to the tropical environment.