Martian dust devils: good for the climate, not so good for future space travellersNASA/JPL-Caltech/Univ. of ArizonaBy Leah CraneThe Red Planet is plagued by devils. It now seems that Mars’s surface is teeming with 10 times as many dust devils as we thought. These rotating columns of dust form around low-pressure air pockets and are common on Mars,...