The rocket scientists and engineers at NASA are pros when it comes to landing robots on Mars. And they're figuring ... to full-fledged 3-D printed models. Challengers compete not only for bragging ...

Elon Musk has announced that 3D printing will be the key to populating Mars in the next 10 years, we took a look at the plan.

3D printers will make the tools, structures and habitats space pioneers need to survive in a hostile alien environment. They will enable long-term human presence on the Moon and Mars.