作者: Joel S. Levine

Dr Joel S. Levine is a Research Professor of Applied Science at the College of William and Mary, USA, and a Consultant and Subject Matter Expert for the NASA Engineering and Safety Center (NESC). He retired from NASA in 2011 after a 41-year career as a Senior Research Scientist and Mars Scout Program Scientist. Dr Daniel Winterhalter is Chief Scientist at the NASA Engineering and Safety Center (NESC). He is also Head of the NESC Robotic Spacecraft Technical Discipline Team and Principal Research Scientist of the Astrophysics and Space Science Section at the NASA Jet Propulsion Laboratory.Dr Russell L. Kerschmann is a medical doctor and a Consultant and Subject Matter Expert to the NASA Engineering and Safety Center (NESC), having previously served as Chief of the Space Biosciences Division at NASA Ames before retiring.