HILLSDALE - Hillsdale College Assistant Professor of Physics Tim Dolch and four physics students contributed their research to the detection of a signal that may help to show gravitational waves that are produced by merging supermassive black holes in other galaxies.Announced by NANOGrav at the American Astronomical Society’s national meeting on Jan. 11, the research is touted as an important step in research on the gravitational universe."Our Hillsdale College team spent many hours