2001: A Space Odyssey.The structure was initially spotted in the desert in Utah last week, and disappeared after five days – with an identical monolith now appearing on the other side of the world.The New York Times speculated that the monolith could have been planted years ago by the late sculptor John McCracken, with others saying a fan of Stanley Kubrick’s iconic film might have erected the structure as a tribute.There is no confirmation currently as to whether the structure was designed by