Searching for life in our galaxy may have just gotten a little harder

Let's say you're a planetary scientist searching for signs of life on other worlds, and you happen upon an exoplanet whose atmosphere contains a large proportion of oxygen. Jackpot, right? Not exactly. New research shows planets orbiting red dwarf stars may harbor signatures of life (like oxygen) that are actually… » 10/11/13 4:40pm 10/11/13 4:40pm