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Here is a primer:

www.usask.ca/biology/455/lecture3.ppt

There is. The first mammals were ancestors for all other mammals.

It wouldn't be part human and part sheep, but it would be a precursor to human and sheep. That is we would could trace our lineages to a common ancestor and that ancestor would be neither human nor...

Since they originated from common ancestors, it should not be very surprising that the parts can be interchanged without much of a problem. :icon_wink:

I will give you that, but it does demonstrate that radical genetic change can occur within a species without comprimising the species ability to survive. Obviously this doesn't show a driving force...

Nothing supernatural going on here.

Who knows. I think the usual suspects will find it wherever you post it.

Or maybe this belongs under the abortion thread, where we were debating what makes something human for purposes of individual rights.

Hey, this belongs in the evolution thread.