Evolutionary Darkness

Back in that time, the earth was a geology tapestry over which the aeons had painted minimalist and monochromatic landscapes with a carboniferous inspiration. Every kind of life form, except the Homos Plus Ultra, had disappeared. This species, obliged by the challenges that the natural selection at a cosmic level imposed to it, took its self-evolution into a new course resulting in the molecular modification of an organism that wasn't base on carbon anymore, but on silicon; with a photosynthetic metabolism that —lacking of an atmosphere whose oxygen atoms had burnt long time ago, or had escaped toward the outer space because of the weakness of the gravity force— processed the gamma and X radiations like a substitute for oxygen.