Researchers working on Seek out Extraterrestrial Intelligence (SETI) work hunt for a similar thing that their predecessors sought for decades-a sign that life arose, seeing that Carl Sagan would express, on another humdrum planet around another humdrum superstar and rose up into something technologically advanced.
It might happen any working day. A strange radio transmission. A weird, simple flash in the night sky. A curiously behaving celebrity with no natural explanation.