I have talked about this a bit more in another comment below: https://news.ycombinator.com/item?id=28936345 https://news.ycombinator.com/item?id=28936345 Ther

I have talked about this a bit more in another comment below: https://news.ycombinator.com/item?id=28936345 https://news.ycombinator.com/item?id=28936345 There are also possible contacts between ancient peoples in Europe and the Americas: https://en.wikipedia.org/wiki/Pre-Columbian_trans-oceanic_contact_theories#Claims_of_travel_in_Roman_times https://en.wikipedia.org/wiki/Pre-Columbian_trans-oceanic_co... But as I mention, the impact of 1492 eclipses it all (that is why is called Pre-Columbian!)