> "Mars is the only planet in the solar system which is entirely populated by robots from Planet Earth." I guess this is really saying that there are no active

> "Mars is the only planet in the solar system which is entirely populated by robots from Planet Earth." I guess this is really saying that there are no active probes on the surface of any of the other (inner/rocky) planets. This strikes me as a very roundabout way of saying this; as though the population of the other planets (besides Earth) included humans or alien robots...