Yahoo News: If asked to compile a list of careers that offer old-fashioned thrills, one might say archeologist (Indiana Jones), or perhaps ship captain (Jack Sparrow). But geographer? Enter Robert Walker, a professor of geography at Michigan State University (MSU), and a scientist whose South American exploits lend his rather stuffy-sounding profession a glamorous luster. Walker's research into land use and its effects requires several trips a year down to Brazil, where he tracks changes ......

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