Putting humans on Mars has been a staple of science fiction and a goal of numerous scientists for decades. Today, thanks to technological advances, fascinating images sent back from the Red Planet by rovers and orbiters, and growing concerns about our future here on Earth, interest in putting boots in that red soil is at an all-time high.
NASA, SpaceX and Mars One are all aiming to land people on our neighboring planet in the next 15 years or so, each on their own timelines and using different architectures. Here’s a look at all three road maps, starting with a plan from Iron Man himself, SpaceX founder Elon Musk.
