AdvertisementMars Dust Storm Now 'Planet-Encircling,' Dimming Hopes For NASA RoverJune 21, 2018Amy HeldfacebookEmailA dust storm has reduced sunlight and visibility on Mars. But NASA's Curiosity rover, seen in a self-portrait taken last week in the Gale Crater, runs on nuclear energy and is powering through. (NASA/JPL-Caltech via AP)
