Mahabharata and Ramayana are epic Indian history. Here is the link where you can find a very attractive and informational blog on immortality. And now in modern science there are evidences of immortality.
Some were cursed with living upto eternity very alone and with sorrow. Some were blessed with immortality so that they could contribute in upcoming era (yugs). The immortals- There is mentioned in Ramayana and Mahabharata that some of the characters will live upto eternity.In Sri Lanka people claim that Ram existed and they actually have places which were mentioned in Ramayana where Bhagwan Ram stayed while bringing back Mata Sita from Ravan. They have religious history which are similar to Ramayana. Foreign proofs- Indonesian people believe that Ram existed.There is a never ending list of prediction that were made which implied that they are real and not just mythology. Great mathematician like Chanakya and Ramanujan studies from ancient Hindu books and sculpture. The concept of multiverse and parallel world, expansion of universe, time dilation and much more are mentioned in Hindu religious books. The distance between earth and sun was told in Hanuman Chalisa which is very accurate to current scientific study. Few will wonder that anyone can predict these thing so here is the another proof. A very valuable part of Mahabharata which predicted the life of people in the coming era KALYUG. The person holding money will hold power and justice will be given according to him. It means amount of money and wealth will be considered as the sign of Man’s good birth.