"There are people that tell you we gotta colonize Mars in the next 50 years if we're to survive as a human race. It's absolute stupidity. All it does is scare people - particularly young, impressionable minds who already think there isn't gonna be a planet in 30 years. Now they're thinking, since there isn't gonna be a planet, "If we don't get to Mars in 30 years, I'm gonna die.""