Answer:
Pre-Columbian trans-oceanic contact theories speculate about possible visits to or interactions with the Americas, the indigenous peoples of the Americas, or both, by people from Africa, Asia, Europe, or Oceania at a time prior to Christopher Columbus' first voyage to the Caribbean in 1492 (i.e. during any part of the so-called pre-Columbian era).[1] Such contact is accepted as having occurred in prehistory during the human migrations that led to the original settlement of the Americas, but has been hotly debated in the historic period.[2]
Reenactment of a Viking landing in L'Anse aux Meadows
Only one historical case of pre-Columbian contact is widely accepted among the scientific and scholarly mainstream. Maritime explorations by Norse peoples from Scandinavia during the late 10th century led to the Norse colonization of Greenland and of L'Anse aux Meadows in Newfoundland,[3] which preceded Columbus' arrival in the Americas by some 500 years. There is also significant evidence of material exchange between the peoples of Siberia and Alaska dating at least five centuries before Columbus' travels to the New World. Genetic evidence presented in 2020 found that some eastern Polynesian populations have admixture from coastal northern South American peoples, with an estimated contact around 1200 CE.[4]
Scientific and scholarly responses to other claims of post-prehistory, pre-Columbian contact have varied. Some of these claims are examined in reputable peer-reviewed sources. Many others—especially those based on circumstantial or ambiguous interpretations of archaeological evidence, alleged out-of-place artifacts, superficial cultural comparisons, comments in historical documents, or narrative accounts—have been dismissed as fringe science, pseudoarchaeology, or pseudohistory.[5][6
