How will people live on Mars? An MIT team developed a design concept addressing this question as part of Mars City Design 2017, an international competition focused on sustainable cities on Mars to be built in the next century.

MIT’s winning urban design, titled Redwood Forest, creates domes or tree habitats that can each house up to 50 people. The domes provide open, public spaces containing plants and abundant water, which would be harvested from the northern plains of Mars. The tree habitats sit atop a network of underground tunnels, or roots, providing access to private spaces and easy, shirt-sleeve transportation to the other tree habitants in the community of 10,000. In addition to connectivity, the roots offer residents protection from cosmic radiation, micrometeorite impacts, and extreme thermal variations.

MIT postdoc Valentina Sumini and Assistant Professor Caitlin Mueller, who teaches in both departments of Architecture and Civil and Environmental Engineering (CEE), led the interdisciplinary team effort, which included nine MIT students from different departments and research groups.

Sumini describes the project’s design fundamentals and forest metaphor: “On Mars, our city will physically and functionally mimic a forest, using local Martian resources such as ice and water, regolith (or soil), and sun to support life. Designing a forest also symbolizes the potential for outward growth as nature spreads across the Martian landscape. Each tree habitat incorporates a branching structural system and an inflated membrane enclosure, anchored by tunneling roots. The design of a habitat can be generated using a computational form-finding and structural optimization workflow developed by the team. The design workflow is parametric, which means that each habitat is unique and contributes to a diverse forest of urban spaces.”

The team aims to build a comfortable environment for inhabitants while using location and system architecture focused on sustainability, a critical component for any Mars community.

Department of Aeronautics and Astronautics doctoral student and System Design and Management Fellow George Lordos MBA '00, who was responsible for the system architecture of Redwood Forest, pointed out the central role of water in building vibrant communities on Mars:

“Every tree habitat in Redwood Forest will collect energy from the sun and use it to process and transport the water throughout the tree, and every tree is designed as a water-rich environment,” says Lordos. “Water fills the soft cells inside the dome providing protection from radiation, helps manage heat loads, and supplies hydroponic farms for growing fish and greens. Solar panels produce energy to split the stored water for the production of rocket fuel, oxygen, and for charging hydrogen fuel cells, which are necessary to power long-range vehicles as well as provide backup energy storage in case of dust storms.”

Many of the features of the design could be also useful on Earth, the designers say. Electric vehicles traveling in underground multi-level networks could help ease congested American cities. The tree habitat design could create living and working spaces in harsh environments, such as high latitudes, deserts and the sea floor. Hydroponic gardening beneath cities could provide fresh fish, fruits, and vegetables with lower land and transportation costs.

The MIT team also includes AeroAstro PhD students Samuel Wald, Matthew Moraguez, and Alejandro Trujillo; architecture PhD student Alpha Arsano SM '17 and research fellow Kam-Ming Mark Tam MEng '15; Integrated Design and Management Program graduate students Meghan Maupin and John Stillman; and civil and environmental engineering undergraduate student Zoe Lallas.