Juliana Buhring had been mired in a dark hole of depression after the death of a man she loved, and when an acquaintance suggested they honor his memory by biking across Canada, she thought, "Canada? Why not the world?" And why not alone. She had never seriously ridden a bicycle before. She had no athletic experience or corporate sponsorship, but with just eight months of preparation, Juliana Buhring departed from Naples, Italy, in July 2012 aiming...