'Gus', a T-Rex discovered in South Dakota, has been bought by an unknown buyer. The monstrous price reflects the fact that dinosaur bones – which are mostly found in the US, China and Argentina – have become a hot investment asset, up there with art, sporting memorabilia and classic cars. He bought a T-Rex named Samson for $600,000 (£446,000) in 2009, at a time when relatively few dinosaur bones were being auctioned. Experts say there have been cases of wealthy couples divorcing and dinosaur bones simply being thrown in a skip. But how much does science matter to the billionaire whose search for the perfect ornament for their front hall is finally over?