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Re: Sloping terrain Re: Woman against Abelisaur
On 7/24/2011 3:10 PM, Thomas R. Holtz, Jr. wrote:
> Well, to be fair, we are obligate bipeds with about the stupidest
> stance that evolution could come up with and still be successful!
> Far better balance when you have front quarters and a balancing
Agreed -- but one tail still does not = 2 legs.
The biped necessarily spends time balanced on one foot. The quad can
traverse the same ground and have three feet solidly planted at all
times, if necessary.
That's all true, but there are yet more ways in which humans are at an
unusual disadvantage. Not only do we balance our center of gravity above
our hip joints, the hip joints themselves are absurdly high up because
our legs are absurdly long. We look like spider monkeys (only with yet
longer legs) -- for the same reason as spider monkeys.
Another factor are our extremely short toes:
Given that the dinosaur world essentially boiled down to bipedal
predators and quad herbivores over it's entire span, and the obvious
negative aspects of falling down while being a mega-biped with
teeny-tiny arms, I am surprised that the ecological implications of
the respective dinosaur locomotion modes have not received more
It would be that way if all else had been equal. But it wasn't. The
theropods had long, somewhat spreading toes; such feet don't sink in
easily, but are easy to pull out because the toes taper and can be
brought together. All sauropods had compact feet and outright columnar
hands that must have sunk in easily and must have created suction when