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Re: Penguins And Rexes
I strongly doubt that Trex had any trouble getting up. Different from a
lying penguin, Trex center of mass, even when lying down, should be rather
close to the acetabulum and if it has its feet forward during lying down,
they are probably more or less directly below the center of mass. So it is
just a question of a big push upwards.
To ease the stresses during this, we can imagine it bending its neck and
tail to the side or upwards (question to anatomy experts: Are Trex tails
upwards bendable like those of dromaeosaurs?) and may also shift weight
around first to one foot then to the other.
It could also first keep the whole foot (from the usually far upwards
positioned ankle joint on) on the ground and straighten the knee and hip
and then raise up.
So all in all, a lot different from penguins, more like other birds (which
all have no trouble there)
Priv.-Doz. Dr. Martin BÃker
Institut fÃr Werkstoffe
Langer Kamp 8