RT @joelwmparker: Presto chango! @ESA_Rosetta sees evolution of the surface of comet 67P. blogs.esa.int/rosetta/2015/0… http://t.co/4mRHUQ9pxG
RT @joelwmparker: Presto chango! @ESA_Rosetta sees evolution of the surface of comet 67P. blogs.esa.int/rosetta/2015/0… http://t.co/4mRHUQ9pxG