I don't think we should get too excited about this without further evidence, as microbes aren't the only (or even the most likely) possible source of complex hy

I don't think we should get too excited about this without further evidence, as microbes aren't the only (or even the most likely) possible source of complex hydrocarbons on a comet. For example, see: http://arstechnica.com/science/2015/07/magic-carbon-layer-not-a-sign-of-extraterrestrial-life/ http://arstechnica.com/science/2015/07/magic-carbon-layer-no...