What floats these boats? Concrete

Associated Press
What floats these boats? Concrete

Members of the University of Florida team carry their concrete canoe to the water for a race during the National Concrete Canoe Competition in Homer, Ill., Saturday, June 22, 2013. The American Society of Civil Engineers National Concrete Canoe Competition is held annually in June to provides students with a practical application of the engineering principles they learn in the classroom, along with important team and project management skills they will need in their careers. (AP Photo/Michael Conroy)

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