A 1,000-mile cloud on Mars may reveal physics never seen in nature

Every morning during the Martian spring and summer, a thin and extremely long cloud emerges, only to disappear again. The wispy formation appears near the volcano Arsia Mons and gradually elongates until it reaches over 1,000 miles—about the distance from New York to Kansas City as the crow flies—before dissipating. This cycle then repeats for several months. Since it was first recorded by a probe in 2018, scientists have been unable to find a plausible explanation for the existence of this clou