http://www.rawstory.com/rs/2013/02/27/millionaire-plans-to-send-man-and-woman-to-mars-and-back/
*Chemical rockets. Too slow. - Dan
A radical re-think of the approach to space exploration: electromagnetic launch & propulsion technology instead of chemical reactions.
*This is why we need to radically re-design our access to space; so that we can lower launch costs and build off-world colonies. - Dan