Mysterious streaks seen on Saturn's moons could be ancient rings

By Adam Mann RESEMBLING claw marks made by some giant space bird, peculiar parallel tracks on Saturn’s moons Dione and Rhea are proving baffling. “I feel like I’m going crazy trying to come up with an explanation,” says Emily Martin at the National Air and Space Museum in Washington DC. A few streaks had been spotted before but not systematically charted. 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,
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