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Re: Running T. rex

I had thought that juvenile tyrannosaurid legs were nearly identical to
ornithomimid legs, but that they became bulkier and the femur:tibia ratio
increased with age.  Is this true?  Perhaps, as Currie has suggested,
smaller tyrannosaurids were runners, but their lifestyles changed as they
grew larger and heavier.  Surely the hatchlings could have run and jumped,

-- Ralph W. Miller III   ralph.miller@alumni.usc.edu