How will humans take the next step into outer space - traveling to Mars not to visit, but to stay?
The United States and China are considering launching manned missions to Mars -- in 25 years. But Netherlands-based Mars One has a bold plan to land humans on Mars in 2027. Is the mission fuelled by wishful thinking and unproven science -- or will private explorations get us there?
1/5 • 2015 • Astronomy