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The World's Most Valuable T-Rex

Peter Larson, president of the Black Hills Institute in South Dakota, tells Witness how his team discovered Sue the T-Rex, the most complete T-Rex fossil in the world, in August 1990.

(Photo Credit: Scott Olson/Getty Images)

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9 minutes

Last on

Mon 10 Aug 2015 07:50GMT

Broadcast

  • Mon 10 Aug 2015 07:50GMT

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