Force of Nature, Power of Experience: Running Rim to Rim to Rim in the Grand Canyon

“A mind that is stretched by a new experience can never go back to its old dimensions.”  ~Oliver Wendell Holmes Jr. I gingerly peered over the side of the North Kaibab trail, which runs from the North Rim of the Grand Canyon down (about 5,600 feet down) to the Colorado River. As I looked down, I saw the Grand Canyon jig and jag from millions of years of evolutionary change. I looked up and saw the cliffs reach upward to the sky, as if praising the sun and the clouds. And, there I was somewhere in the middle of this expanse, nothing but a molecular speck, clinging …