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Re: Penguins And Rexes
On Thu, 11 Aug 2005, frank bliss wrote:
> If they could, the snout would be prone to abrasion lifting so much
> weight. An injured snout would likely be the site of potentially
Unless, possibly, it had a lot of callous there, or perhaps ossicles. I
was thinking more along the lines of bone growth to meet the stress, but
tissue issues would figure in as well.
> 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
Kitty tails haven't much mass, plus their front legs aren't
> doesn't have those advantages. (No tail, no traction, no long, very
> strong legs.) It all may be speculation without tell tail signs of
Ah, the insight of watching two hours of penguins on a big screen...they
do have tails and they often used them for bracing when holding eggs
or young - I was very surprised by that detail. (not that I have an
interest in penguins, mind you, but like most folks and seen lots
of pictures and short clips over the years and it's one of those things I
> 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.
Anyone with a rex simulation handy?
> 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?