Dear Vishnu, The documentation of any occurance may not happen at the time of occurance itself and so we should not confuse that the time of documentation is the time of occurance. In olden days, wirtting was not invented, and so for generations, Ramayan was just carried on by words listened from elders. Finally Valmiki documented te whole thing and gave it. This does not meam that Valimiki got birth with Lord Ram. For your example of the earth, reaerchers contrdicted the belief only when they were able to prove that otherwise. here we are telling a long believed fact wrong because we are not able to prove it with the present technologies.
