Comment by chestertn

There are plenty of valid claims that many other civilizations contacted America: https://en.wikipedia.org/wiki/Pre-Columbian_trans-oceanic_co...

But it is meaningless since they did not write about it nor they stablished commerce. The fact is that before 1492, most civilizations in Africa/Asia/Europe did not know that America existed and that other humans lived there. After 1492, that changed forever.