https://www.cnet.com/news/scientists-find-the-source-of-all-that-crazy-mars-dust/ > Mars is looking pretty hazy these days thanks to a nutty global dust storm that sent one of NASA's rovers into hibernation. All that dust had to come from somewhere, and scientists believe they've found the main source.  > The over 600-mile-long (1,000-kilometer) Medusae Fossae Formation near Mars' equator traces its origins to long-ago volcanic activity.  A new study published in the journal Nature Communications calls out the wind-eroded Medusae Fossae as the single largest source of dust on Mars.