Hi, this is not to discourage further discussion, but you may be interested in these answers from our FAQ:

https://www.reddit.com/r/AskHistorians/comments/1o2uyu/if_the_vikings_visited_north_america_before_1492/

https://www.reddit.com/r/AskHistorians/comments/3jll9c/one_of_the_main_reasons_europeans_were_so_utterly/