Today I read a strange story about who discovered the Americas. It is about that Turkish President Recep Tayyip Erdogan said that Muslims, not Columbus, discovered Americas. The assumed discovery should have happened in the year 1178 in the Gregorian calendar.
2nd there is much speculation about that someone else crossed the oceans. Only archaeological evidence (so far) is that the Vikings were on Newfoundland of the coast of Canada at a place today called L’Anse aux Meadows. That happened around year 1000 in the Gregorian calendar. (By the way they came from Greenland, that geographically is a part of the Americas).
3rd Christopher Columbus and his crew arrived in the Americas in the year 1492 in the Gregorian calendar.
That is the data quality part of the story. The rest is information quality.