100,000 galaxies later, no sign of life. Using NASA's WISE satellite, astronomers thought that if an entire galaxy had been colonized by advanced civilizations capable of space travel, then the galaxy would generate tremendous amounts of infrared energy due to their technologies. (Could we perhaps call this "Galaxy Warming?").They found 50 candidates with "unusually high" levels of mid-infrared radiation. According to this article, in their "billion-year" lifetimes there would have been "plenty of time for them to have been filled with alien civilizations, if they exist. Either they don't exist or they don't yet use enough energy to recognize them." Notice two things - First, they claim that "time" is sufficient to make life, given the raw materials, of course. This goes contrary to the obvious fact that molecules do not write messages of life, they can only carry messages coming from intelligence outside the molecules themselves. Second, maybe the failure of SETI (Search for Extraterrestrial Intelligence) to make contact with civilizations sending out real messages has reduced expectations to just detecting waste products. But how would they know that the heat source is life? Simply stated, just more evolutionary circular reasoning.