Viability of Making Mars Life-Sustaining in the Next 50–100 Years (Without Harming Earth's Ecosystems) — Revised condensed critical review

This revised condensed critical review distinguishes enclosed habitats, regional biological habitability and planet-wide terraforming. It evaluates proposed magnetic shielding, water supply, atmospheric modification and environmental governance using traceable literature and transparent quantitative checks. Modeling does not establish integrated feasibility, cost, a success probability or a breathable Mars within a century. The review prioritizes measurable habitat performance, resource characterization, model validation and environmental assessment. Revised edition dated 29 October 2026, derived from the April 2025 original (21,021 words in the retrieved source). This condensed review preserves the original history and makes no claim of peer review, new experiments or new climate simulations. Original ResearchGate record: https://www.researchgate.net/publication/390832301 ; original DOI: https://doi.org/10.13140/RG.2.2.35487.27046 . AI assistance was used for source retrieval, editorial restructuring, citation checks, calculation checks and preparation of this revision. CC0 applies to the author’s new contributions; the original CC0 freedoms remain unchanged and third-party rights are not waived.