Horse evolution

Interesting discussion, via Paul Garners blog and now taken up by Todd Wood: Todd doesn't shy away from the hard questions. It's a series of answers at objections made by Kevin N: :

The rate of evolution needed to go from Hyracotherium to Mesohippus to Merychippus to Pliohippus to Equus (or whatever other path one presents) in just a few centuries after the Flood is extreme, to say the least. The changes between these organisms is not just a matter of changes of size, but also significant changes in their limb bones and teeth.

Todd's reply:

You are definitely correct, and I wish I could give you a really good answer. My stock answer is that all the speciation mechanisms we know about today are not adequate to explain this kind of rapid change and we need to develop a new one. I suspect it has something to do with genomic rearrangements via transposable elements induced by environmental stress, but this is based primarily on work in bacteria (here and here). You might say I'm turning into a radical neo-neo-Lamarckian. In short, I speculate that with the correct kinds or threshold of environmental stress, genomes will spontaneously reorganize and produce novel morphologies which can become new species. It is not random change; the changes must be directed and are designed to happen.

Todd ends this long post with:

So that's what I have to say. What excites me most about this post is the amount of stuff we don't know. There are many questions to be answered and many opportunities for future creationists to make important contributions to creation research. If we had all the answers, that would be boring.