Algae could synthesize bioplastics to construct self-sustaining habitats for future human colonies. Researchers report that Dunaliella tertiolecta thrived on July 2 in Science Advances when grown inside translucent, bioplastic (PLA) habitats under Mars-like conditions. Algae or plants that produce bioplastics grown inside the habitats could provide more material to build livable structures. The 3D-printed chambers feature a cloudy finish that filters out harmful UV rays while still allowing enough light for algae to photosynthesize and thrive. It’s easier to grow algae or plants in Mars-like conditions than it is to keep humans alive, Wordsworth says. Researchers describe the system as a key advance toward sustaining life beyond Earth. As Wordsworth explains, “It’s very hard to keep humans alive anywhere for long periods without plants.”