Shark attacks on humans were at the lowest levels in half a decade last year, and a Florida researcher says hard economic times may be to blame. Sharks attacked 59 people in 2008, the lowest number of attacks since 57 in 2003, according to George Burgess, director of the International Shark Attack File, part of the Florida Museum of Natural History on the University of Florida campus in Gainesville. There were 71 attacks in 2007
