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Re: T-rex arms
> The casts I saw showed a nasty looking gnarl of bone where the
>bicep had been pulled off the &*%$# bone of the T. rex forelimb. T. rex
>does NOT get such injuries by using these limbs to gather nest materials,
>scratch its butt, or whatever. The interpretation I heard: T. rex was
>holding something big. That something pulled away. That something was
>probably an Edmontosaurus or Triceratops or T. rex.
>The estimate, from muscle scars,
>mechanics, etc., was that the males could generate 450 lbs. of pull per
>arm, females 800. Again, this is not vestigial. Highly specialized yes,
>perhaps in Albertosaurus, where the limbs are much smaller, maybe
>vestigial, but not in T. rex, if these estimates are correct, and if the
>interpretation of this damage on the arm bone is correct. I agree, these
>arms were used for something, if they had that much muscle, and if they
> show this kind of traumatic injury and musculature.
>
> -nick L.
>
Well, another possibility surely is that the arm may have been grabbed by
the mouth of another animal (perhaps another T rex) during a fight and
wrenched hard?
--
Ronald I. Orenstein Phone: (905) 820-7886 (home)
International Wildlife Coalition Fax/Modem: (905) 569-0116 (home)
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