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RE: Tarbosaurus?

    Sure, just as soon as YOU provide evidence that the preservational
biases againt juvenile tyrannosaurs were precisely identical in two
different depositional environments on two different continents which
already show evidence of other differences in preservation involving
tyrannosaurs.  Can you, George?  I can't explain how you get such unusually
high preservation of tyrannosaurs in general in the Nemegt Formation
compared to Hell Creek, but it seems to have happened regardless.  We're
both just hypothesizing here, but your assumption that the preservation
ratio of juvenile and adults should be identical in the Nemegt and Hell
Creek Formations is unfounded.
    The only real evidence we have whether or not the big and little
Tarbosaurus specimens belong the same species or not is morphological, and
morphological studies suggest there is a gradation in size and morphological
change between the little and big tyrannosaur specimens consistant with
ontogenetic change.<< (Hey, I remembered to put that in) :>
What articles are you using for the large number of juvenile Tarbosaurs? I
don't recall the paper/s.