5. Pushing the Limits

In her final Christmas Lecture, Nancy Rothwell reveals some of the incredible adaptations that animals have evolved to cope with life in the extremes. From anti-freeze blood to double-layered fur, each animal has found its own way to overcome the extremes. We also learn what it takes for humans to survive in these locations – from the perilously cold conditions confronted by Antarctic explorers to the extreme forces experienced by fighter pilots.