Colbert: What would constitute – y’know – a “Howdy!” from space
Shostak: Well you’re looking for the kind of signal transmitters make, not the kind of signal nature makes – quasars and pulsars, that sort of thing. You’re looking for the kind of signals [for example] a television broadcaster would make.
Colbert: Well, maybe they use quasars and pulsars to send signals.
Shostak: They’re bad engineers if they do that. Those signals are all over the band.