SpaceX founder Elon Musk plans to get humans to Mars in six years

SpaceX founder tells meeting of astronautical experts that his only purpose is to 'make life interplanetary', revealing plans for reusable ship to Mars

SpaceX founder Elon Musk has outlined his highly ambitious vision for manned missions to Mars, which he said could begin as soon as 2022 - three years sooner than his previous estimates.

However, the question of how such extravagantly expensive missions would be funded remains largely in the dark.