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This Martian Crater Has a Weirdly Earth
JAY GORY, MANAGING EDITOR, science
NASA's Mars rover Opportunity was exploring an uncharted Martian valley last month when it encountered a shockingly familiar sight: Streams of rocks and gravel stretched down the hillside of Perseverance Valley — a roughly 600-foot (183 meters) drop down the inner slope of a crater — in seemingly organized rows. The patterns closely resemble so-called "rock stripes" seen on certain mountains on Earth, NASA said in a statement. Perseverance Valley is thought to have been carved hundreds of thousands of years ago by a combination of water, ice and wind — already making the spot unusual by Martian standards, NASA wrote. read more
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