The Bhandarkar Oriental Research Institute started preparing a critical edition of Mahabharata in 1919 had also had such a view.
Particularly, the western scholarship was perplexed, bewildered and refused to believe that any man, that too, dated to 3102 BCE could have written such a work.
The planetary references in Valmiki Ramayan were actually seen from the given latitudes and longitudes around 5100 BC and these matched sequentially. The way in which archaeological, paleobotanical, oceanographic, geological, ecological and remote sensing research reports corroborate the astronomical dates is amazing!
As the name suggests the book provides the readers with scientific evidences about the Ramayana and the Vedas.
The book complied by Saroj Bala and Kulbhushan Mishra, gives the readers a clear picture about the hidden facts about our mythology.
Therefore the history of growth of civilization in the world is not 4 to 5 thousand years old but it is more than 10,000 years old.
So far history of the world, particularly of Indian subcontinent, is based on linguistic guesswork and religious beliefs/hearsay.