What a great post. Thanks for "Baring Your Soles."
I occasionally go out barefoot, and will drop like a newborn calf if I walk over the smallest pebble. I tell myself in those weak moments that I'm actually a strong man but that I'm spoiled by all the shoes I've worn. And if I were to have lived like our pre-agricultural ancestors--barefoot since day one--I could walk over anything.
Do you think that's true? Do you think human feet exposed barefoot over a lifetime can become adjusted to walking normally on gravel or rocks? Or is 104 days not long enough to tell?