Watching a David Attenborough documentary–Planet Earth–with a Sioux Indian is mildly disconcerting. Attenborough is intoning about the bison. That’s a magnificent animal I say. That’s a lot of meat, she says. We used to hunt them with arrows, she says. You could kill them with arrows? Nah, but if you could immobilize it you could hack at it. I blanch even whiter. That’s a lot of meat she says again.