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Re: Theropod stance balance




On Thu, 14 Apr 2005 09:29:22 -0700 (PDT) don ohmes <d_ohmes@yahoo.com>
writes:

> So how the hell did Sue get up?

How the Hell Creek did Sue get up, you ask?  Here's one hypothesis: From
a side-on-ground position: 1) tuck legs tightly under body, 2) roll onto
belly, 3) then simply stand up.

Besides, chiropractors always tell people to "lift with your legs".

Or possibly like ostriches get up after having fallen (anyone know how
ostriches recover from a fall?).


BTW:  T. rex and ostriches are perfectly ballanced for two-legged travel.
 T. rex had air-sacs in its skull that greatly reduced the head's weight,
along with a recurved neck (moreso than on other theropods), and a long
massive tail.  Ostriches, lacking a tail, have an even longer, more
strongly recurved neck.  Recurving the neck shifts the center of gravity
rearward.

I suspect that T. rex was nowhere near the theoretical limit for bipedal
mass/size.  If the mass extinction hadn't occured, I can easily envision
continued size inflation in evolving dinosaurs.  A 15-ton super
Troodontid preying on a 20-ton ultra-triceratops would be quite a sight.

<pb>
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