“Doctor Bug” speaks tomorrow night  at the South Florida Museum in Bradenton.  Mark Moffett  is a research associate in Entomology with the Smithsonian Institution and has travelled the world studying and photographing ants.  He’s written a new book titled “Adventures Among Ants: A Global Safari with a Cast of Trillions”.    Moffett says the invasive fire ants found in Florida are among the nastiest he’s encountered.