Episode 1. David Attenborough tells the story of the discovery and reconstruction in Argentina of the world's largest-known dinosaur, a new species of titanosaur - measuring 37m long. 1/1. Following the discovery of possibly the largest creature to have ever walked the Earth, found deep in a South American desert, sparking the greatest prehistoric detective story of our time.

Episode 1. David Attenborough tells the story of the discovery and reconstruction in Argentina of the world's largest-known dinosaur, a new species of titanosaur - measuring 37m long. 1/1. Following the discovery of possibly the largest creature to have ever walked the Earth, found deep in a South American desert, sparking the greatest prehistoric detective story of our time.