Human survival on Mars depends on effective shielding from cosmic rays, solar particle events, and secondary radiation generated by the thin atmosphere and absent magnetosphere. The MARS (Multi-layer Anti-Radiation Shelter) concept integrates boron-rich, hydrogen-rich, and high-Z materials into a multilayer architectural system that captures neutrons, moderates secondary cascades, and attenuates gamma rays. These layers can be sourced or synthesized in situ, reducing launch mass while coupling naturally with life-support infrastructure. Monte Carlo transport simulations indicate over 95% dose reduction during peak solar particle events, with scalable protection adaptable to long-term missions. MARS thus emerges not merely as a structural design but as a framework of continuity—where safety, constructability, and sustainability converge, and architecture itself begins to act as the organ of life. Keywords: Mars habitat; radiation shielding; in-situ resource utilization (ISRU); Monte Carlo simulations; sustainable ecosystems
Tokiya 時矢 Sagawa 佐川 (Sat,) studied this question.