Synopsis
David Attenborough looks at how mammals dominate the planet through having warm blood and caring for their young, including Weddell seals, caribou and humpback whales.
Similar broadcast resources

Defeating the Superbugs | Horizon
Meeting the scientists who are tracking the emergence of 'superbugs' - dangerous bacteria resistant to antibiotics - around the world.

Ultra-Processed Food: A Recipe for Ill Health? | Panorama
Ultra-processed foods contain chemicals that regulators say are safe, but there is emerging evidence of a link between some of these chemicals and cancer, diabetes and strokes.