11. Columbus discovered America
At 2 am on the 12th of October 1492, land was sighted aboard the Pinta and the discovery of America was attributed to Christopher Columbus.
But Native Americans had settled the Americas before Columbus (obviously). There is also cartographic evidence that Portuguese explorers visited the Americas and mapped the area in 1424. Additionally, Norse explorer Leif Erikson set foot on the shores of Newfoundland in Canada, long before 1492. Remains of Viking-type settlements were found in 1963, and dated to about half a century before Columbus.