Marylou Tousignant The Washington Post

The 3D-printed Habitat Challenge is a five-year competition hosted by NASA and its partners to design housing for deep-space exploration, including trips to Mars.

The call could come any day now. When it does, Tyler Armstrong hopes to be one step closer to doing something he has dreamed about for years: climbing Mount Everest, Earth's highest peak.

The 3D-printed Habitat Challenge is a five-year competition hosted by NASA and its partners to design housing for deep-space exploration, including trips to Mars.

The call could come any day now. When it does, Tyler Armstrong hopes to be one step closer to doing something he has dreamed about for years: climbing Mount Everest, Earth's highest peak.