There is a program to actively search for signals from other civilizations in this galaxy: SETI. This is a noble cause, but it seems slightly absurd. Scientists huddle around radio telescopes listening intently to one star at a time for the sound of dripping water, when what they are seeking would sound like Niagara Falls. The most cursory radio snapshot of the sky should reveal K2 civilizations as clearly as the lights of great cities seen from orbit at night. That we don't see any such radio beacons in the skies probably means there are no Kardashev Level Two civilizations in this galaxy.
Perhaps advanced civilizatons don't use radio, or radar, or microwaves. Advanced technology can be invoked as an explanation for the absence of extra terrestrial radio signals. But it seems unlikely that their technology would leave no imprint anywhere in the electromagnetic spectrum. We have been compared to the aborigine who remains blissfully unaware of the storm of radio and TV saturating the airwaves around him. Presumably, the aliens use advanced means of communications which we cannot detect. What these means might be is, by definition, unknown, but they must be extremely exotic. We don't detect K2 signals in the form of laser pulses, gamma rays, cosmic rays, or even neutrinos. Therefore, the aliens must use some system we haven't even imagined.
This argument, appealing though it is, cannot survive contact with Occam's razor - in this case Occam's machete. The evidence in hand is simply nothing - no signals. To explain the absence of signals in the presence of aliens, demands recourse to what is essentially magic. Unfortunately, the iron laws of logic demand that we reject such wishful thinking in favor of the simplest explanation which fits the data: No signals; no aliens.
The skies are thunderous in their silence; the Moon eloquent in its blankness; the aliens are conclusive by their absence. The extraterrestrials aren't here. They've never been here. They're never coming here. They aren't coming because they don't exist. We are alone.
For a past post on the topic, see 'Aliens - There are None'. Of course, there are plenty of alien apologists in the comments. In my experience, belief in aliens tends to be symptomatic of naive, television-and-movies-based SL2 futurism. Geoffrey Miller thinks that we haven't met aliens because they're all stuck in wirehead mode, but I'm skeptical. I also notice that it is right around the 10-year anniversary of the announcement of microfossils supposedly found in a Mars-originating meteorite. Of course, this turned out to just be mud.
My angle: if we want to see aliens, we'll have to make them with our own hands.
Oh yeah, another thing. Anne C. released a podcast.