In the morning we set off for the Lamar valley, passing high meadows filled with glacial erratics. I always enjoyed looking at fields of erratics, like some mountain god's toys strewn about after a tantrum. But majestic though they may be, they are only geological evidence of the ice ages. Erratics, moraines and valleys are all impressive, but at the same time relatively common.
This is why I was so impressed when we saw the pronghorn antelope, and I learned about their evolutionary history. For the first time, I saw biological evidence of the ice ages. A literal living remnant of that lost time, right before my eyes.