Mars, we need a billion dollars, and we're going to make up the revenue with advertising and media rights and so on. You might be able to make up some of the money that way, but I don't think that anyone who is interested in making money is going to invest on that basis – invest in this really risky proposition, and if you're lucky you'll break even? That doesn't fly." Despite his criticisms, Zubrin became an adviser to Mars One on 10 October 2013. Astronauts Canadian former astronaut Julie Payette said during the opening speech for an International Civil Aviation Organization conference that she did not think Mars One "is sending anybody anywhere". In January 2014, German former astronaut Ulrich Walter strongly criticized the project for ethical reasons. Speaking with Tagesspiegel, he estimated the probability of reaching Mars alive at only 30%, and that of surviving there more than three months at less than 20%. He said, "They don't care what happens to those people in space... If my tax money were used for such a mission, I would organize a protest." Space tourist Richard Garriott stated in response to Mars One, "Many have interesting viable starting plans. Few raise the money to be able to pull it off." Former astronaut Buzz Aldrin said in an interview that he wants to see humans on Mars by 2035, but he does not think Mars One will be the first to achieve it. Publications Wired magazine gave it a plausibility score of 2 out of 10 as part of their 2012 Most Audacious Private Space Exploration Plans. The project lacked current funding as well as sources for future funding. The organization had no spacecraft or rocket in development or any contracts in place with companies that could provide a spacecraft or rocket. While plans point to SpaceX for both resources, the company had no contracts with Mars One in an industry that typically plans contracts decades in advance. See also References Further reading Book: External links Human missions to Mars Non-profit organisations based in the Netherlands 2012 establishments in the Netherlands 2019 disestablishments in the Netherlands Colonization of Mars Defunct organisations based in the Netherlands Confidence tricks Cancelled space probes Projects established in 2012 Projects disestablished in 2019