Christopher Columbus, Nasiraddin Tusi and real discovery of America

Though America was discovered by Christopher Columbus 510 years ago, that discovery has a lot of obscurities, which make people to think. According to most scientific works, Ch. Columbus thought that, he had discovered East Asia. I tried to prove that, the Genoese seaman had got acquainted with the map of Nasiraddin Tusi when he was in Spain before his travel to the western part of the Atlantic Ocean and was aware of the existence of unknown territory there. Yes, N. Tusi had described America in his map together with its coordinates 220 years before Ch. Columbus's transatlantic travel. It is one of the most phenomenal discoveries of the world and Ch. Columbus is the author of this discovery.