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Heart of stone?

The "News" section in Nature ( 9/21/00 - Nature 407, 275 - 276) has an 
article on the _Thescelosaurus_ specimen, specifically that the "heart" may 
be a concretion.  "Doubts grow over discovery of fossilized 'dinosaur heart' 
"  by Rex Dalton.

Tim Rowe CT scanned the specimen and is evidently going to publish a 
"rebuttal" of the findings that were in the original paper (April 21, 2000 -