The megaliths of Pankhri Barwadih, near Barkagaon, were probably erected in its position, somewhere between 2000 and 1500 BC. On the days of vernal equinox and autumn equinox, the Sun is observed to rise from the V in between these megalithic stones. Obviously the people living in these parts, 3500 years ago had developed some observatory over here.
After his discovery in 2000, Subhashis Das published these in his books Sacred Stone of Indian Civilisation and Unknown Civilisation of Prehistoric India. Das was fascinated to find that during the two equinoxes on March 20 and September 22, when day and night are equal in length, the sun seemed to spring out of the twin megaliths at Pankri Barwadih. He started calling it the Equinox site.
Sacred Sites International Foundation, the US, — an organization that envisages preservation of natural and built sacred places — has identified Punkri Barwadih as the second most endangered heritage site in the world. For, the ancient menhirs present at the site have writings all over it. The following are excerpts from one of its articles by Bulu Imam: