Even if the delicate digital hardware running these machines keeps going, and even if they are the smartest roving robots this side of Mars, navigating through the scrub, dust and rock ofthe Mojave desert represents a complex challenge.
They even planted trees to cut dust that flows in from the Gobi Desert, but today, today was one ofthe worst days we've seen in the week we've been here.
Blowing dust forced the California Highway Patrol to close state Route 14 in the high desert Antelope Valley north of Los Angeles due to low visibility.