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25 surprising facts about the red planet – Mars

WATCH OUR OTHER PLANET VIDEOS: 25 Dizzying Facts About Planet Saturn - <a ...
Amazon S3 on MSN

25 fastest recorded phenomena in the universe

Speed in space gets confusing fast. We throw around terms like kilometers per second, fractions of the speed of light, Lorentz factors, and superluminal motion, and before long, everything sounds like ...