Dreadnoughtus
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Dinosaur titan's big bone haul

Fossils unearthed in Argentina represent the most complete titanosaur sauropod dinosaur ever discovered.

About 70% of the animal's key bone groups have been preserved, meaning scientists can confidently calculate its true size in life - at 26m in length and 60 tonnes in mass.

Ken Lacovara from Drexel University explained the significance of Dreadnoughtus schrani to our correspondent Jonathan Amos.

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