Are astronauts more likely to develop blood clots during space missions due to zero gravity? That's the question NASA is trying to answer with help from UNC School of Medicine's Stephan Moll, MD, professor in the UNC Department of Medicine. A new publication in Vascular Medicine shows the results of an occupational surveillance program spurred by the development of a deep vein thrombosis (DVT) in the jugular vein of an astronaut, which is described in detail in a New England Journal of Medicine publication from 2020.