Perhaps this is an old wive's tale, but I remember being told that if you cut an earth worm in half it grows a new half, to become whole again. I don't remember having any luck growing more worms as a kid, and, I decided, as an adult that, cutting animals in half, unless I planned on eating them, was not very nice.

There must be some biology majors here, that can elaborate on all the species that grow new parts. I also remember something about tails, leg's etc. on amphibians..... So, do earthworms really regenerate?

And yes, we do share something like 99% of our genome with the worm and most critters on earth. (Pretty amazing, because we think we are 'all that') It is that 1% that we don't share, that makes us mysterious humans.

Never-the-less, I do hope they continue to try to grow new nerves, and altho small fibers can regenerate, it would be nice if they could figure out how to arrest small fiber neuropathy due to any cause.