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Somewhere toward the end of the last ice age, we formed an alliance with wolves: Maybe the ancestors of dogs got food scraps while our own ancestors gained protection from predators and other humans. These social species eventually collaborated on a vast scale, possibly even hunting woolly mammoths...
My husband and I were contemplating whether to hike the 3-mile trail in Utah’s Zion National Park that September day. I’d read that this trail was our best chance to spot bighorn sheep, but after a week of exploring the five national parks in the state, our bodies were tired—and it was already late...