Crocodiles have been on the Earth for 80 million years. They have survived mass extinctions, glaciations and cataclysms, but now they face the earth's most powerful predator: man.
Nigel Marven comes face-to-face with the deadly terciopelo snake.
Nigel Marven describes the difference between a milk snake and a coral snake.
Nigel Marven likes his snakes - even the deadly ones!
How did a female Komodo dragon give birth when she had never had contact with a male?
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.
The animal is a relative of modern boas and lived in Colombia 58-60 million years ago.