Marine mammal Marine mammal Marine mammals are aquatic mammals that rely on the ocean and other marine ecosystems for their existence. They include animals such as seals, whales, manatees, sea otters and polar bears. They do not represent a distinct taxon or systematic grouping, but rather have a polyphyletic relation due to convergent evolution, as in they do not have an immediate common ancestor. They are also unified by their reliance on the marine environment for feeding. Marine mammal adaptation to an aquatic lifestyle varies considerably between species. Both cetaceans and sirenians are fully aquatic and therefore are obligate water dwellers. Seals
Brain Droppings book. In May 2000, the book was published as an audiobook by HighBridge, in both CD and cassette tape formats. The audiobook received a Grammy award, Carlin's third, in February 2001. Since there was a 3-year gap between the printed book and the audiobook, a few things were changed due to changes in both Carlin's personal life and in the world in general. Brain Droppings Brain Droppings is a 1997 book by comedian George Carlin. This was Carlin's "first real book" and contains much of Carlin's stand-up comedy material. According to the cover, the book contains "jokes, notions, doubts, opinions,