Attenborough and the Giant Dinosaur

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 - close to four London buses put end to end - and weighing 70 metric tons, it now holds the record as the biggest animal ever to walk the Earth. In 2014, a shepherd spotted the tip of a gigantic fossil bone sticking out of a rock in the Argentinian desert. Palaeontologists soon uncovered a massive 2.4m long (femur) thigh bone. By the end of the dig they had uncovered more than 220 bones. This documentary follows the twists and turns of this forensic investigation.