We've been searching for alien intelligences out there for decades, and so far we haven't found a single blip. But maybe we're just going about it the wrong way?
Geoff Marcy, the chair for SETI at the University of California at Berkeley, recently told io9 he'd like to start searching the depths of space for Dyson spheres — those massive star-encasing structures that could be built by advanced extraterrestrials. He's right. Here's why the best way to find aliens is to search for Dyson spheres in deep space.