You can find some info here http://www.astrobio.net/pressrelease/2900/life-is-lonely-at-... D. audaxviator survives in a habitat where it gets its energy not from the sun but from hydrogen and sulfate produced by the radioactive decay of uranium. A lot of research at the time my friend was working was not published as some of these organisms could produce gold as a metabolic product. True alchemists!