If humans ever call Mars home, NASA thinks houses on the red planet could look like one of the three designs the space agency picked as a finalist in its 3-D Printed Habitat Challenge.
The chosen homes include small holes for natural light, and one even contains a room for growing plants.
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NASA tasked teams with designing shelters suitable "To boldly go where no man has gone before." The mission plans include Mars, the moon and possibly beyond.
The three teams split a prize of $100,000 between them. They will now have to create 3-D printed scale models of their homes for the next round.
$800,000 in prize money is still up for grabs.