Dolphins are an aquatic mammal and there are many different types of them.
Cool, I like dolphins. Remember the show Flipper?
Yes, i do.  Dolphins are Cetaceans, and Cetaceans closest relative are hippopotamuses.  Can you believe that?
Thats amazing, I would never of guessed that.
You Don't Say!
You Don't Say! is an American television game show that had three separate runs on television. The first version aired on NBC daytime from April 1, 1963 to September 26, 1969 with revivals on ABC in 1975 and in syndication from 1978 to 1979. The last two incarnations were executive produced by Ralph Andrews and produced (with Gary Hunt) and directed by Bill Carruthers.
NBC broadcasts were produced by Ralph Andrews-Bill Yagemann Productions in association with Desilu Productions (later Paramount Television
feature adducted big toes, making it difficult if not impossible to grasp branches with the hindlimbs. Besides locomotion, "A. afarensis" also had a slightly larger brain than a modern chimpanzee (the closest living relative of humans) and had teeth that were more human than ape-like.
Prominent examples Pakicetids, "Ambulocetus".
The cetaceans (whales, dolphins and porpoises) are marine mammal descendants of land mammals. The pakicetids are an extinct family of hoofed mammals that are the earliest whales, whose closest sister group