https://rationalwiki.org/wiki/1421_theory
WebOct 31, 2022 · The 1421 theory is a crackpot claim that the Chinese (specifically, the fleet of the admiral Zheng He) reached the Americas in 1421 — decades before Christopher Columbus, discovered Australia, Antarctica, Greenland, circumnavigated the globe one century before Ferdinand Magellan's 1519 voyage, and that various Native American …