Thornton, William E. (William Edgar), 1929-2016-03-182016-03-181972http://hdl.handle.net/2152.3/604Graph showing the change in body mass over the course of the SL-2 SMEAT flight simulation for "PLT" (Simulation Pilot, Bo Bobko).Space medicine.Space flight--Physiological effect.Weightlessness--Physiological effect.Skylab Program.Image