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Re: Reevolving bones?

At 02:50 AM 5/7/97 -0400, you wrote:
>         So what if it had been conservative? If the animals were
> experiencing selection pressure for a four-toed foot, I wouldn't be
> surprized if the foot changed drastically...>>
>Tom Holtz knows this as well as anybody on the planet. Now tell me what kind
>of selection pressure would create a four-toed foot from a three-toed foot.

   Perhaps somebody could explain this in a little more detail.  The last
time I checked, ALL theropods have a four toed foot.

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