More recently Rose and Rand Flem-Ath have proposed this in their book, "When the Sky Fell"; the theory was revised and made more specific in Rand's work with author Colin Wilson, in "The Atlantis Blueprint" (published in 2002). The second work theorized that Atlantis was to be found in Lesser Antarctica, near the coast of the Ross Ice Shelf. A geological theory known as "Earth Crust Displacement" forms the basis of their work. The Atlantis Blueprint uses both scientific and pseudoscientific (such as mere speculation and assumptions) means to back up the theory.