During a trip to Colorado as a child, I found gold. I had previously devoured Jack London’s “Call of the Wild,” imagining myself out in the Canadian Yukon or the Alaskan Klondike finding gold. Unable to convince my parents to take me to Alaska — I unsuccessfully suggested this family vacation every year as a child — the Colorado Rockies at least fit the image in my gold-panning dreams better than Missouri. And then it all came true. I found gold.