I have a vague recollection of this coming from the discovery of pulsars. One of the candidate theories about the regular pulses was extraterrestrial life. Seem

I have a vague recollection of this coming from the discovery of pulsars. One of the candidate theories about the regular pulses was extraterrestrial life. Seems like it would be hard to rule out ET if you're encountering something genuinely new. New theories would take weeks or years to cook up.