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Re: Penguins And Rexes

If they could, the snout would be prone to abrasion lifting so much weight. An injured snout would likely be the site of potentially reoccurring fungal infections just like modern reptiles that injure their snout against the glass in a cage. Scarring on the soft tissue is a given but whether this would leave something for the paleopathologist to see on fossils is a good question that I can't answer. Would the counterbalance of a swinging large heavy tail along with strong legs (with pretty good traction) be enough to get up? Just watch a cat swing it's tail around and the net effect. A penquin doesn't have those advantages. (No tail, no traction, no long, very strong legs.) It all may be speculation without tell tail signs of repeated snout infection (which could be from feeding or fighting injuries too) or a very fortuitous trace fossil set. Interesting concept though. Perhaps they used what ever works much like us in a bad balance situation.
Frank Bliss
MS Biostratigraphy
Weston, Wyoming

On Aug 11, 2005, at 9:49 PM, Richard W. Travsky wrote:

Saw "March of the Penguins" earlier this week, and noted something I hadn't before about penguins (not unexpected when they're on screen in front of you for almost 2 hours).

They had two ways of getting up when traveling on their bellies.

One, obviously, pushing up on their flipper arms.

The other was pushing up with their beaks, with no arm usage.

So, question - In the past there's been mention in the list of how
rexes got up, what with those tiny arms and all. I don't recall if
anyone proposed pushing up with their jaws. That would seem like
a lot of weight to raise. Do their jaws look sturdy enough to
do that? Do their jaws show signs of being used in this fashion?