Who would have thought that humans might actually be designing homes we could live in on Mars? That's been the focus of a $3.15 million competition held by NASA since 2015 - to build a 3D printed habitat for deep space exploration, including the agency's journey to Mars. 

The multi-phase challenge is seeking to advance the construction technology needed to create sustainable housing solutions for Earth and beyond. The Seal Test Stage has just been concluded, with the final Habitat Print challenge to be held in April.