This expands into an infinite tree of maybes. My point is that its worth looking because a satellite with a fish eye IR camera wouldn't be that expensive and th

This expands into an infinite tree of maybes. My point is that its worth looking because a satellite with a fish eye IR camera wouldn't be that expensive and the benefit would be huge. We know for a fact that such a satellite would have a good chance of spotting any star farers that are remotely like us, even if they are significantly more advanced but still "fast" in terms of their energy use and general way of doing things. Space Ents belong to a long tail of other possibilities, but they also must obey the second law...