2001: Space Odissey, novel. In AD 1999, Dr. Heywood Floyd travels to the Moon's Clavius Base, where a scientist explains that they have found an electromagnetic disturbance, designated Tycho Magnetic Anomaly One (or TMA-1, Monoliths - Black Cuboids), in the crater Tycho. Excavation has revealed a large black slab, precisely fashioned to a ratio of 1:4:9 (or 12:22:32) and therefore believed the work of intelligence. Visiting TMA-1, Floyd and others arrive just as sunlight falls upon it for the first time since it was uncovered; it emits a piercing radio transmission which the scientists determine is directed at one of the moons of Saturn, Japetus (Iapetus).