A large number of megalithic hat stones were found from a single site during a recent archaeological salvage excavation at Nagaparamba in Kuttippuram village of Kerala.
Hat stones are popularly called Thoppikkallu in Malayalam.
They are hemispherical laterite stones used as lid on burial urns during the megalithic period.
It could ostensibly throw light on the life and culture of people who lived in those parts more than 2,000 years ago.