"Return to the Sea portrays the life and evolutionary times of marine mammals--from giant whales and sea cows that originated 55 million years ago to the deep diving elephant seals and clam-eating ...

Water covers more than 70% of the Earth’s surface, offering diverse habitats for countless species, including marine mammals. Some mammals have uniquely adapted to aquatic life, evolving specialised ...

For tens of millions of years, whales have been a part of the oceans. Because of this, it would be easy to believe that ...