In this infinite universe of ours, every event that occurs and every choice that we make continually split away into countless individual timelines—alternate realities, if you will. So who's to say that Bigfoot, Kraken, Martians, even Cthulu himself aren't perfectly real but simply residents of a now divergent reality? Matthew Buchholz, author of Alternate Histories of the World illustrates just a few major alternate historical events of the last 6,000 years.