Chris McKay is the Author of - Making Human Exploration of Mars Biologically Reversible
Chris talked about making manned exploration of Mars biologically reversible at the Mars Society Convention in Eugene last month. This belies Barry's assertion that humans could go to Mars for a hundred years, because we might contaminate Martian life. The contamination issue can reasonable be described as a set of engineering problems.
Robert Clark posted Chris' abstract here:http://www.habitablezone.com/space/messages/286061.html
