Most wildlife documentaries show how animals behave, but by exploring their anatomy, Inside Nature's Giants reveals how these creatures really work.
Vet Mark Evans, anatomist Joy Reidenberg and evolutionary biologists Simon Watt and the renowned Richard Dawkins get to grip with everything from elephants, whales and crocodiles to giant squids, polar bears and racehorses in a bid to find out how they've evolved and how they function.
In their quest for the ultimate truth there's only one way to understand how these incredible animals work - to dissect them and examine what's underneath their skin.