Amkhoi, a village tucked inside a forested zone of Birbhum district in West Bengal, not far from Bolpur (gateway to Shantiniketan and the university founded by Nobel Laureate poet Rabindranath Tagore), was suffering from shortage of water. It was while digging a pond that remains of petrified wood was discovered. Soon experts realised these were remains of trees which existed here 15 million to 20 million years ago.