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Solving the mystery of a dinosaur mass grave at the 'River of Death'
A group of researchers have come to Pipestone Creek in Canada to figure out why thousands of dinosaurs are buried here.
Brute force is needed to crack open the thick layer of rock that covers what Professor Emily Bamforth, who's leading the dig, describes as "palaeo gold". The species, and Prof Bamforth's excavation, feature in a new landmark BBC series - Walking With Dinosaurs - which uses visual effects and science to bring this prehistoric world to life. All the evidence suggests that this catastrophic event was a flash flood - perhaps a storm over the mountains that sent an unstoppable torrent of water towards the herd, ripping trees from their roots and shifting boulders.
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