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Re: Rex Fall part 1

        "Cortical thickness" means actual bone, right? How exactly do the
calculations take into account the fact that T. rex had hollow bones? Does
anyone know if ostriches have hollow limb bones (I'd assume so,

[Cortex is derived from (in fact, I think it is) the Latin word for
 "bark" (as in the stuff found on trees).  Therefore, the cortex of
 the bone excludes the hollow center. -- MR ]