Sir David Attenborough continues the Life series by revealing the surprising lives of our cold-blooded cousins; the reptiles and amphibians.
Sir David Attenborough reveals the unknown lives of cold-blooded reptiles and amphibians.
Wood frogs have the curious ability to withstand freezing.
A gallery of that cold-blooded, scaly group of animals: the reptiles.
Nigel Marven didn't expect to be bitten on the nose by this boa, we could see it coming!
Nigel Marven wrestles an enormous anaconda during Wild Colombia.
Somehow they've been labelled as horrible slimy-skinned critters.
The animal is a relative of modern boas and lived in Colombia 58-60 million years ago.
Bushcraft expert Ray Mears talks about coming across a monitor lizard in Indonesia.
Ray Mears talks about his fondness for adders.