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Monday the 12th, Dr. Holtz wrote (in response to Louis Rey):

>To be fair to Ruben, he *explicitly* stated that he did not consider
>_Megalancosaurus_ a bird ancestor of any sort.  However, he did say >that
>shouldn't dismiss information from it (specifically, his interpretation of
>it as a glider) as a model for some hypothetical stage in avian origins
>(following the Bock scenario-driven hypothesis of bird flight origins).

Who is "Bock", and what was his scenario? (Like I said before, I`m a bit
behind the times.). Thanx!