Robert Silverberg Quote

THE EAGLE HAS LANDED by Robert J. Sawyer I’ve spent a lot of time watching Earth—more than forty of that planet’s years. My arrival was in response to the signal from our automated probe, which had detected that the paper-skinned bipedal beings of that world had split the atom. The probe had served well, but there were some things only a living being could do properly, and assessing whether a lifeform should be contacted by the Planetary Commonwealth was one.