Life in the World's Oceans. Episode 14, The Taxonomy of Marine MammalsLife in the World's Oceans. Episode 14, The Taxonomy of Marine Mammals

Through tens of millions of years, evolution has resulted in a fascinating array of marine mammal adaptations. With the ability to process thousands of gallons of water each day or dive to a depth of almost three kilometers, and with numerous methods of locomotion or extraordinary social behaviors, these whales, porpoises,…