Amazing Animals
Just Swinging
A gorilla swings on a rope in its exhibit at the Franklin Park Zoo, Thursday, Feb. 5, 2009 in Boston. Not long ago, zoos thought keeping animals alive and healthy meant serving food in bowls and giving them limited physical activities out of fear of injury. Now all of the nation's zoos have enrichment programs of some kind, some even mandated by the federal government. (AP Photo/Mary Schwalm)












