Ulyana Horodyskyj calmly gave a 25-minute talk about space travel to a room full of rocket scientists at the University of Alabama in Huntsville on Wednesday. What’s so special about that? Dozens of speakers talked about space this week at the Advanced Space Propulsion Workshop at UAH, a semiannual event that brings the nation’s top rocket scientists to Huntsville. What’s special about Horodyskyj is she’s a 17-year-old high school student from Ohio.