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Re: Fw: Dinosaurs and birds
----- Original Message -----
I think I understand the "they-can't-run-any-faster" point/analogy quite
well. The analogy isn't apt, nor are your assumptions. You assume that an
animal that can generate forward thrust directs it exactly
forward/parallel to the ground, and further, cannot quickly re-direct that
thrust. You also assume that the thrust generated is constant in force,
another major flaw of the car analogy. You further assume that for a speed
increase from fore-limb assistance to be advantageous, it must occur at
full running speed. None of the above assumptions, although necessary for
mathematical analysis, are correct in an _evolutionary_ context.
I grew up on a farm too. Don't miss it much.
I think maybe you're assuming that Mike and I are making assumptions that
neither of us assume...... :-)