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Re: Why did small dinos become extinct?

----- Original Message ----- From: "Tim Williams" <twilliams_alpha@hotmail.com>
To: <dinosaur@usc.edu>; <twilliams_alpha@hotmail.com>
Sent: Thursday, December 13, 2007 6:12 PM
Subject: RE: Why did small dinos become extinct?

(2) quill knobs, which were once thought to have been indicative of flight (or at least flight ancestry) are now reported for _Velociraptor_, suggesting (but not proving) that this character may not have originally evolved for flight. <

Might quill knobs have evolved for carrying airloads generated for directional control (same thing as evolving for flight....) ?