Scientists grow algae in Mars-like conditions inside bioplastic pods

Researchers at Harvard’s John A. Paulson School of Engineering and Applied Sciences have successfully grown green algae (Dunaliella tertiolecta) inside bioplastic pods designed to simulate Mars-like conditions. The team recreated Mars’ thin atmosphere, with pressure over 100 times lower than Earth’s, and used 3D-printed chambers made from polylactic acid bioplastic. These chambers effectively blocked harmful UV radiation while allowing enough light for photosynthesis. Despite the low atmospheric pressure that typically prevents liquid water from existing, the pods maintained a pressure gradient stabilizing water, enabling algae survival in a harsh, carbon dioxide-rich environment. This breakthrough suggests the potential for creating self-sustaining, closed-loop habitats on Mars, where bioplastic shelters could grow algae that in turn produce more bioplastic, enabling habitats to maintain and expand themselves over time. This biomaterial approach contrasts with traditional, resource-intensive construction methods by mimicking natural growth processes. Combined with previous innovations like silica aerogels to address