591239 external_news 1493753424 1493839137 It seems like every day that astronomers discover another possibly habitable world, like Proxima Centauri b, our closest exoplanent neighbor, and TRAPPIST-1f, one of seven recently discovered Earth-sized planets orbiting the same star. But don't prepare for first contact just yet. It will be exceedingly complicated to figure out whether there's actually any life or potential for it on such planets, based on new research into our own evolving world. Chris Reinhard, an assistant professor in the School of Earth and Atmospheric Sciences, co-authored the study, which was published in Astrobiology.

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