In this episode of Curbside Consults, we discuss aerospace medicine with two physicians who are double boarded in internal and aerospace medicine and are also NASA astronauts. Dr. Auñón-Chancellor recently served as Flight Engineer on the International Space Station for Expeditions 56 and 57. She is an internist at Louisiana State University Health Sciences Center and program director for the University of Texas Medical Branch Aerospace Medicine Residency. Dr. Michael R. Barratt was selected by NASA in 2000 and has participated in two spaceflights and performed several spacewalks. Dr. Barratt serves in the Mission Support branches providing medical and human factors expertise to multiple spaceflight programs. He also has served as a lecturer for the Aerospace Medicine Residency at the NASA Institutional Scientific Collection and University of Texas Medical Branch, Wright State, and the U.S. Air Force School of Aerospace Medicine.