... Supernova showered Earth with radioactive debris . ... Titan gives clues about early Earth . Study compares organic haze on Titan and early Earth. ... O rganic haze in the atmosphere of Saturn's moon, Titan, is similar to haze in early Earth's air -- haze that may have helped nourish life on our planet-- according to a NASA Astrobiology Institute study released Nov. ... Today's haze on Earth is also created photochemically, which means sunlight powers chemical reactions in the atmosphere. ...