Echoes of the Invisible presents a series of deeply personal journeys: a blind man's solitary run from the driest place in the Americas to the highest U.S. mountain; artist Rachel Sussman's effort to photograph the oldest living organisms on Earth; journalist Paul Salopek's 21,000-mile walk following the path of early humans across the planet; scientists exploring the universe's earliest moments; and monks examining the depths of human emotion. Each, in their own way, finds something that unites us, offering a perspective beyond the distractions of modern life.