They became stuck in mangroves and on mudflats
                                
                                
                                    (Newser) -
                                    At least 82 dolphins, including juveniles and calves, have died in a mysterious incident in a remote section of Florida's Everglades National Park. Officials say 95 dolphins—a particular species known as false killer whales, which typically swim at depths of 3,000 feet—were seen stranded in the...