I prefer alternate history myself.
1492: Columbus sails the ocean blue. Due to inaccurate calculations, his fleet sails right past Cuba without ever spotting it or another landmass in the Americas. They all eventually die of starvation/thirst.
1732: The Inca and Aztec cultures make first contact. The Aztecs give the Incans their writing system, while the Incans give the Aztecs llamas.
1767: Spanish pirates land on the shores of Newfoundland, and are the first Old Worlders to successfully reach the New World.
1859: Alfred Russel Wallace publishes his book on the theory of evolution before Charles Darwin can publish his. As a result, Darwin becomes a footnote in history, and Young Earth Creationism never comes to exist.