Dolphin Killer whales have the second largest brain mass of any animal on earth, next to the sperm whale. The brain to body mass ratio in some is second only to humans. Self-awareness is seen, by some, to be a sign of highly developed, abstract thinking. Self-awareness, though not well-defined scientifically, is believed to be the precursor to more advanced processes like meta-cognitive reasoning (thinking about thinking) that are typical of humans. Research in this field has suggested that cetaceans, among others, possess self-awareness. The most widely used test for self-awareness in animals is the mirror test in which a mirror
The Day the Earth Stood Stupid into "Pride and Prejudice". Fry breaks free of the illusion, and quickly writes a story in which he is crushed to death by a bookcase, one riddled with "plot holes and spelling errors". In accordance with the story, the giant brain announces it is leaving Earth "for no raisin" (Fry's misspelling of "reason"), and the people of Earth regain their intelligence. Other than the Nibblonians, Fry is the only other one to have any recollection of the event, and no one believes his story. Nibbler returns to his undercover position observing Earth as Leela's adorable pet. Fry's immunity to the