Regarding B, I had the pleasure of meeting a handful of San [1] elders to record some of their songs. I learned that some of them walked ~10km to meet with the

Regarding B, I had the pleasure of meeting a handful of San [1] elders to record some of their songs. I learned that some of them walked ~10km to meet with the rest of us and did not think much of it. In general their lifestyle is probably a lot less sedentary than mine. 1: https://en.m.wikipedia.org/wiki/San_people https://en.m.wikipedia.org/wiki/San_people