Artificial Gravity Research to enable Human Space Exploration, Published 2009, 37 pages. The scope of the report covered the key biomedical research questions that need to be answered to make artificial gravity a practical countermeasure and the facilities and flight opportunities required to answer key questions to accomplish the necessary research. Human and animal experiments, on Earth and in space, were considered for both short-radius intermittent centrifugation and long-radius continuous rotation paradigms.