In 2009, a group of passionate scientists stumbled upon fossils of the titanoboa - the biggest snake of all time.
The animal is a relative of modern boas and lived in Colombia 58-60 million years ago.
At 48 feet long, the snake is one of the greatest discoveries since T-Rex.
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!
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.
Ray Mears talks about his fondness for adders.
Heading to China, Nigel Marven sets off on a Yunnan Adventure.
Snakes are the stuff of some people's nightmares.