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NASA Tests New Device for Mars Landings

The U.S. space agency's test run of a Mars landing system came to a disappointing end Monday when the saucer-shaped vehicle's parachute failed to unfurl high over the Pacific Ocean. It was the second attempt by NASA engineers to test the new parachute system. A similar problem plagued the device's debut run last year.  NASA hopes the concept will revolutionize planetary exploration. After several weather related delays, the world's largest helium balloon was launched...

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