Mammals

How air-breathing mammals have adapted to a life in water

How air-breathing mammals have found remarkable ways to overcome the many challenges of a life in water, from freshwater jungle ponds to the dark depths of the open ocean. Featuring footage of the birth of a huge sperm whale calf, never-before-filmed orca hunting behaviour, and coastal coyotes in Mexico that have learnt they can benefit from the daily offerings washed up on the shore with each new tide