astrobiology

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Did Life on Earth Begin on Mars? Sample 25, Viking, and the Evidence We Left Behind

Perseverance sealed the strongest potential Martian biosignature yet inside Sample 25. Viking's 1976 results are being re-litigated. NASA's return architecture lost funding as the evidence strengthened. This report reconstructs the science, the institutional bottleneck, the 2028 propulsion test, and the larger possibility that Mars sits upstream of Earth's biology.

Published Aug 9, 2026 Article · related

Sunset on Mars: The Blue Hour That Shows What Happened to a World

A sunset on Mars is not just a beautiful image from another planet. It is a physics lesson, an atmospheric fossil, and a reminder that Mars is not simply “the Red Planet.” Martian sunsets often appear blue because fine dust in the thin atmosphere scatters light differently than Earth’s atmosphere does. The blue glow around the Sun is not just scenery. It is the visible signature of a planet that lost most of its atmosphere, dried out, and became a cold, exposed world where light itself tells the story of planetary failure.

Published May 21, 2026 Article · related

K2-18 b: The Planet That Shows How Close We Are to the Edge of Knowing

K2-18 b is not proof of alien life, but it may be one of the most important exoplanets ever studied because it shows how the search for life is shifting from imagination to contested atmospheric chemistry. JWST has detected methane and carbon dioxide in its atmosphere, while disputed DMS and DMDS claims show how difficult it will be to separate biology, chemistry, instrument noise, media hype, and human hope.

Published May 18, 2026