MINNEAPOLIS (AP) -- If you've ever wondered whether swimming through water makes you faster than swimming through gunk, a university professor has an answer. University of Minnesota professor Ed Cussler has long wanted to know if paddling through a substance thicker than water would slow someone down or allow them to swim faster. With that in mind, Cussler coaxed 19 people, including some members of the university's varsity swim team, to swim in water mixed with guar - a food thickener. Logic suggests that a thicker substance would hinder swimming. Yet, as he watched the swimmers Monday, Cussler said, "It's...