The main reason that I’m convinced that life exists on other planets, is the sheer variety of environments on Earth that shelter life, seemingly against all odds. From the scalding waters of the sharkcano, to lakes entombed in ice, to the corrosive slim of Villa Luz, life finds a way. Today’s edition is similar to the Antarctic lake, but it’s further upstream, on the glaciers that feed such lakes, or that feed into the oceans. Unlike Lake Untersee, these communities are on the surface of the ice, which means a surprisingly diverse community for little puddles in glacial ice: