Rover hears first-ever 'mini-lightning' crackling across Mars

NASA’s Perseverance rover has made the first-ever detection of electrical discharges—described as “mini-lightning” or crackling sparks—on Mars, revealing that the planet’s dusty atmosphere is more electrically active than previously thought. Over 28 hours of microphone recordings spanning two Martian years, researchers identified 55 distinct electrical-discharge events linked to strong winds, dust devils, and storm fronts. These faint electrical zaps, caused by triboelectricity from shifting sand and dust, differ from Earth-style lightning but indicate frequent, subtle sparks occurring in Mars’ thin carbon dioxide atmosphere. This discovery, led by Baptiste Chide and colleagues, has significant implications for understanding Martian atmospheric chemistry, climate, and habitability. Electrostatic discharges could drive chemical reactions in the soil and atmosphere, potentially affecting surface chemistry and the preservation of organic molecules. Additionally, these electrical events may pose risks to future robotic and human missions. While the evidence currently relies on audio and electromagnetic signals without