NEW YORK (Reuters) - America may dominate the world in sports and culture but in one arena where size doesn't matter, the "Geography Olympics," the United States was 88th behind minnows such as Madagascar and the Marshall Islands. More than 46,000 Americans have taken part in this online geography competition started by a man with a mission: Roger Andresen, who quit his job as a fiber optic engineer two years ago when he realized most Americans have never heard of Nauru and don't know Cameroon is in Africa. Working from his home in Georgia -- the U.S. state, not the...