“Multiple measurements (including those of the skull, hip and limb) show that RSM P2523.8” - Scotty’s specimen number at the Royal Saskatchewan - “was a robust individual with an estimated body mass exceeding all other known T. Persons was lead author of “An Older and Exceptionally Large Adult Specimen of Tyrannosaurus rex,” the paper that makes the case for Scotty not only as bigger than Sue, but older too. It took so long to fully excavate the bones, separate them from stone and properly measure them because they were in sandstone that was particularly dense due to its high iron content, Persons said.
Persons is talking here about Scotty, the skeleton discovered by a high school science teacher in 1991 and named after the liquor the teacher and the RSM paleontologists he was with drank to celebrate finding it. “It is certainly a thrill to stand next to the specimen, to hold it in your hand, and know that you're looking at what is currently, at least, the largest known terrestrial carnivore of all time,” said Scott Persons, a dinosaur paleontologist at the University of Alberta, the neighboring province of Saskatchewan, which is essentially north of Montana.
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