Resumen de Mysterious streaks on Saturn's moons
Resembling claw marks made by some giant space bird, peculiar parallel tracks on Saturn's moons Dione and Rhea are proving baffling. A few streaks had been spotted before but not systematically charted. Emily Martin's team did so using data from NASA's Cassini probe, and named them linear virgae. Their brightness and the way they lie on the landscape suggest they are relatively young, perhaps no more than a billion years old.
