And this, the next step in the search for alien life: long-infra-red.
For mine, they'd be better off searching for intelligent life here on Earth.
Although we're supposedly civilized and at the top of the food chain for IQ/intelligence, I think mankind has regressed since Adam and Eve were naked in the Garden of Eden. As the story goes, they covered themselve once they had lost their innocence, so their being naked and not naked is relevant to the devolution of mankind. Now there's a misnomer... mankind. To a great extent, man is far from kind.
Since then, when Adam and Eve felt the need to cover their rude bits, thus losing their innocence, mankind has become the most violent, corrupt and destructive species on the planet. That suggests to me there is very little use of the intelligence God gave us, or a complete lack thereof.
As for rude bits, well they wouldn't be rude if Eve hadn't chomped into that Apple and conned Adam into chomping down on it as well. Thanks to that we have fashionistas making huge amounts of money for designing the better fig leaf... and millions of young lasses worldwide suffering either with bulemia or anorexia or both because the fashionistas created unrealistic expectations.
Frankly, I'd prefer the pre-apple era, myself. Not only would the fashionistas not be getting rich off promoting extremely skinny models, I wouldn't have to imagine what Kat Denning's puppies really look like... she'd be frickin' naked.
Hmmm, a horrible thought just occurred to me. I wouldn't want to see my ex naked, among others, so those who fall into that category... those "bugger that, I gotta turn the other way" types, should eat the damned apple.
Okay, so what has all this got to do with discovering Dyson Spheres/detecting alien lifeforms? Plenty! Even if we did discover there was Aliens in this or that galaxy, they're not going to want anything to do with us until mankind gets out of short britches and grows up.
Oh, and another thing, mankind needs to abolish bankers. While we've got those evil parasites [read profiteering bastards] sucking the life out of us, no self-respecting alien is going to allow contact whatsoever. Come to think of it, which I do, that should probably include lawyers, politicians and car salesmen.
So, before NASA or whoever gets serious about seeking and contacting alien life, we need to do some housekeeping, right?