John Hurt narrates the facts behind the discovery of huge nesting site in modern day Patagonia. Fossilised remains show Argentinosaurus laid tens of thousands of eggs in a 15 km nesting site used for hundreds of thousands of years. The hatchlings, if they survive, will grow at an incredible rate. Over a 40 year life span Argentinosaurus can grow from 4 kg to 75 tons! Narrated by John Hurt Planet Dinosaur tells the stories of the biggest, deadliest and weirdest creatures ever to walk the Earth, using the latest fossil evidence and immersive computer graphics. Subscribe to BBC Earth: http://bit.ly/ydxvrP Visit http://www.bbcearth.com for all the latest animal news and wildlife videos BBC Earth Facebook http://www.facebook.com/bbcearth (ex-UK only) BBC Earth Twitter http://www.twitter.com/bbcearth BBC Earth YouTube Channel: http://www.youtube.com/BBCEarth Latest BBC Earth videos: http://bit.ly/y1wtbi