PRINTING BUILDINGS: NASA's challenge to adapt additive manufacturing for robots on Mars is only one sign 3D printing is becoming a reality in construction.

The article reports on the 3D-Printed Mars Habitat Design Challenge, which focuseson how to go about building structures on the planet Mars to eventually house human explorers. It's a component of National Aeronautics and Space Administration (NASA) Centennial Challenges, a contest series which solicits the public to solve the practical problems of future space exploration. The usage of robots in the execution of the project is also discussed.