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Re: _T. rex_ strikes ( was Ceratopsian frills)
Stan Friesen wrote:
> > I think the physics of a wolf's attack make a larger size undesirable.
> If it did then they would *be* larger.
We agree.... I think?
> Note there was, once upon a time, a much larger species of wolf,
> _Canis dirus_, which became extinct some time ago (in human terms).
> It is known in great numbers from the La Brea Tar Pits. This shows
> that when conditions favor a larger size, a larger wolf could exist.
I don't know what it weighed, what its proportions were, or what it
ate. I think the encyclopedia gave its length at 6 feet and the length
of a big modern wolf at 5, excluding tails. I described it as "not
dramatically bigger." That seemed vague enough to disguise my
> > Still, I would have expected scavengers to look more agile and have
> > more menacing arms.
> Actually, most scavengers are rather odd looking. The largest
> scavengers I know of now are the brown hyena (*not* the larger spotted
> hyena, which hunts), and the two species of condor. Neither is what
> I would call particularly agile.
I think condors eat by checking out a lot of opportunities, not by
chasing off land animals. I would expect a hyena to be a lot more agile
than a 40-foot biped.
> Also, for its size _T. rex_ looks *incredibly* agile - it is about
> as gracile (slender) as it is possible for a 5 ton animal to be.
Maybe "agile" isn't the word I want, but it's the only one I can think
of. I mean the ability to change motion abruptly. For example, tall
basketball stars are fast and coordinated, but short players have become
stars because they can make more sudden moves. I call that agility.
A giraffe is slender, but it seems too tall for sudden moves.
A tall, slender runner may have the efficiency to excel in marathons,
but a shorter, stockier runner may be a faster sprinter.
Among 5 ton animals, I'd expect _Triceratops_, with its short, muscular
legs, to be much better at quick moves and short sprints than _T rex_.
Thanks for your remarks.