1,000-mile-long cloud that forms and vanishes on Mars every day obeys 'exotic physics' never seen on Earth

Scientists have identified a recurring 1,000-mile-long cloud on Mars that forms and dissipates daily, driven by meteorological processes previously unseen on Earth. New simulations suggest the phenomenon involves exotic physics related to the planet's unique topography.
Why it matters
Understanding these unique Martian weather patterns provides critical insights into planetary atmospheres and the potential for extreme meteorological phenomena elsewhere in the solar system.
New simulations suggest that the perplexing Arsia Mons Elongated Cloud (AMEC) repeatedly emerges in the Red Planet's skies thanks to a never-before-seen meteorological process.
By Harry Baker Edited by Brandon Specktor , Laura Mondrag n Published 7 October 2026 In News When you purchase through links on our site, we may earn an affiliate commission. Here's how it works .
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in