The Life of Mammals

Dolphins, sea otters and blue whales

David Attenborough swims alongside sea otters, discovering he is no match for their natural agility in the water, while in Florida he takes a dip with manatees for the first time and observes their feeding habits. On the coast of California, he encounters the largest mammals on the planet, blue whales, and reveals how they, along with porpoises and dolphins, learned to court, mate and give birth in the water