Mars’s Mysterious Cloud Defies Physics, Scientists Reveal

Scientists uncover exotic physics behind Mars's strange cloud. New study reveals unexpected atmospheric process on the Red Planet.

Editorial Desk

October 7, 2026 One Min Read

POLICY WIRE — Paris, France — A peculiar cloud on Mars has baffled scientists for years, but new research suggests it operates under unusual physical laws that challenge current understanding of planetary atmospheres.

The Arsia Mons Elongated Cloud, or AMEC, stretches over 1,800 kilometers and appears annually, growing and fading each morning. First observed in 2018, its formation has remained a mystery despite extensive study using data from the European Space Agency’s Mars Express spacecraft.

📄 POLICY WIRE WHITEPAPER PUBLISHED: PAKISTAN’S NATIONAL SECURITY POLICY PRIORITIES

👉 READ BY CLICKING HERE

Researchers now believe they have solved the puzzle by incorporating previously theoretical physics into their models. According to lead author Jorge Hernández-Bernal, this involves a rare process called homogeneous nucleation, where water vapor directly forms ice particles without needing dust or other particles. This phenomenon, never before seen in a planetary atmosphere, could reshape how scientists study other worlds.

Reporting by Policy-Wire (PW)

Author

Editorial Desk

Policy Wire is your go-to editorial hub for insightful perspectives and informed analysis on pressing policy issues, both regionally and globally. Over the years, Policy Wire has collaborated with leading international news agencies—including AFP, AP, Reuters, and others—to provide fact-based reporting and nuanced commentary. With a commitment to clarity and credibility, we aim to bridge the gap between complex policy debates and public understanding, ensuring that our readers stay informed on the issues shaping the world today.