CNN Anderson Cooper 360 June 15, 2013 04:48:00
Week-long excavation they believe one of these will rival the most complete skeleton of a trisasatpos found. how old is this? millions of years. >> reporter: is it an addiction? >> it's an addiction, that's right. once you start doing this, you can't stop. >> reporter: the only time this independent fossil collector stopped digging, when we went to federal prison. in 1990 he paid a rancher to unearth the world's largest complete fossil of a t-rex on the land. larson named it sue. later the rancher, the u.s. government and su indians claimed possession. the government seized the t-rex and he wa...
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