In June, 2004, Colin Angus left Vancouver on his bicycle. Nearly two years later, he rolled back in, looking like a castaway, and having completed the first human-powered circumnavigation of the globe. Angus cycled, skiied, and rowed a route that took him to Alaska, across the Bering Sea and the Siberian winter, across Europe from Moscow to Portugal, then across the Atlantic to Costa Rica-a 156-day rowing odyssey. From there it was a short...