Frank Lehot is a medical doctor, qualified in aerospace medicine and emergency medicine. He works in private practice and in hospitals. He also alternates between the roles of flight surgeon, instructor and safety navigator during the weightlessness flights of Novespace’s Airbus A310 Zéro G, dedicated above all to scientific research and now open to the public. His activities have led him to take an interest in human physiology in microgravity. He is a lecturer and author of several books on the history of the conquest of space, parabolic flight, suborbital tourism and space medicine.