My thoughts go like this. I’m in a national park – a relatively remote one, at that – and one may think it’s untouched and pristine, but no, it’s not. There was a mine in this park. I scramble among the ruins, trying not to touch too much. The desert has worn out the mine by now: it’s just over a hundred years old and it looks the part. And I say desert. This used to be grassland, but ranchers’ cattle gobbled it up. It is still beautiful. So, okay, there was a mine in this not-pristine wilderness but what about before that? Before the treads of cattle and the settlers who brought them, Native Americans were here; you can see old symbols they…