T. rex bones

[Jeff Poling <jpoling@dinosauria.com>]

   I was recently asked if _T. rex_ had hollow bones, and I couldn't
remember one way or the other.  Which is it?  The _Dinosauria_ doesn't seem
to say, unless I didn't recognize the term, which is possible.  What is the
term for hollow bones, to go into the anatomical dictionary?

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