text:  But just how tornadoes will continue to change is something we still don't know. Sci-fi digital producer Emma Gomez saw the movie and spoke to a meteorology expert to decode some of the science from twisters and talk about how real-life tornadoes are changing. Joining me is Dr. Bill Gallis, a meteorology professor at Iowa State University. Welcome to Science Friday, Dr. Gallis. Well, hello, Emma. It's nice to be here.