The Brainspawn have been collecting information in the universe for a thousand years, planning on attaining everything and then destroying the universe so no new info can be made. When the information collecting was complete, the Infosphere opened to scan itself. When Fry lamented that he wished Nibbler hadn't froze him, the Infosphere revealed that it was possible for Fry to go back in time and stop Nibbler from tripping Fry.