 The object's similarity to the one in Stanley Kubrick's 2001 Space Odyssey and a possible connection to other installations around the world has convinced many that the Colorado monolith was part of some sort of clandestine public art project. Graves says nobody saw or heard anything unusual in the days before the monolith was discovered, but she did notice unfamiliar tire tracks leading up the hill. But I don't know what kind of cars aliens drive, do you?