A dry landslide—not liquid water—is the most likely explanation for at least one of the bright streaks seen recently on Mars, a new study concludes. The streaks first made waves in 2006, when scientists reported them in pictures of Martian gullies taken in 2005. [National Geographic]
For the first time, astronomers have pinpointed the spot where the intense winds of two massive stars in a binary system violently collide and detected the production of high-energy X-rays there. [MSNBC]
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