When light from the two most prominent galaxies in this image started toward us (about 90 million years ago), Earth was in its Late Cretaceous epoch. Dinosaurs dominated on land, sharks were beginning to appear in the sea, and mammals tended to be rather small and, well, tasty. But what was happening in galaxies NGC 5101 (top right) and NGC 5078? Did they host myriad star systems teeming with evolving life? Were civilizations rising through their time and then being lost to it, leaving nary a trace for us to discover? If the inhabitants of a planet in one of the galaxies trained their space telescope at Earth, would they see only signs of the precursors of intelligent life – and then focus their search elsewhere in our Milky Way for their alien peers?