Toothed whale brain size with the expected brain size based on such allometric analysis provides an encephalisation quotient that can be used as another indication of animal intelligence. Sperm whales have the largest brain mass of any animal on earth, averaging and in mature males, in comparison to the average human brain which averages in mature males. The brain to body mass ratio in some odontocetes, such as belugas and narwhals, is second only to humans. Dolphins are known to engage in complex play behaviour, which includes such things as producing stable underwater toroidal air-core vortex rings or "bubble rings". Two main
Last Woman on Earth color-corrected 35 mm print and was released on DVD through Image Entertainment, featuring introductions by Corman, with commentary tracks by Jones-Moreland and Carbone. The release also features the other two films in Corman's "Puerto Rico Trilogy," "Creature from the Haunted Sea" and "Battle of Blood Island", shot back to back with "Last Woman". Last Woman on Earth Last Woman on Earth (often referred to as "The Last Woman On Earth", but it appeared without "The" in the film's actual title card) is a 1960 American science fiction film that was produced and directed by Roger Corman. It tells the story