Atlantis is an alternate history series by Harry Turtledove, in which the east coast of North America split off from the rest of the continent around 85 million years ago and formed Atlantis, a separate continent farther east in the Atlantic. In the preface to "Audubon in Atlantis" published as part of the collection Atlantis and Other Places, Turtledove mentions that his inspiration was reading that New Zealand had separated from Australia some 85 million years ago and wondering about the implications if the same thing had happened to a large chunk of eastern North America.