earlier discovery of the americas

What if Morocco sends ships west for a route to the East alternate from Mamluk sultanate discover Americas instead of Colombus from Spain. Barbary pirates conquer aztecs and inca like the Conquistadors How will this effect the history of Americas ? How will this effect Europe ? How will this...

Alfonso IV of Portugal encouraged trade and exploration from 1325 to 1357. This led to the discovery of the Canary Islands (which Genoa already knew of), but Castile claim the islands as their’s. Assuming Alfonso IV was more passionate and aggressive in seafare exploration could this mean the...

793 Raid on Lindisfarne begins the Viking Age 794 Discovery and Settlement of Faroe Islands by Norse explorers 796 Discovery of Iceland by Floki 800 Settlement of Iceland begins 810 Discovery of Greenland 812 Discovery of Markland (OTL Labrador) 815 During an exploration of the Greenland coast...

1035: OTL coastal Massachusetts "Fleeing the violent skrælings of the north, and not deterred enough to leave, Thorfinn Karlsefni departed south in the early years of the 11th century. He and his settlers traveled down the east coast of the newly discovered land until they reached a great bay...

By Native Americans, I mean all pre-Columbian inhabitants of the Americas, from the Arctic to Tierra del Fuego. In OTL, many of the different native cultures succumbed to Old World diseases they never could have developed immunity for, up until that point (due to a multitude of factors)...