Recent research in Nature Communications suggests that weak magnetic fields above Martian basins may stem from prolonged dynamo reversals, which reduce field strength over time. Through cooling models, scientists revealed that these reversing processes could account for Mars’s unique magnetic history, rather than indicating an early shutdown of the Martian dynamo.Recent research in Nature Communications suggests that weak magnetic fields above Martian basins may stem from prolonged dynamo reversals, which reduce field strength over time. Through cooling models, scientists revealed that these reversing processes could account for Mars’s unique magnetic history, rather than indicating an early shutdown of the Martian dynamo.