Space
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NASA chief defends Mars mission, colonization of Red Planet necessary for human survival
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Lyrid meteor shower: Last chance to watch it this year
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ISS astronauts successfully perform spacewalk to replace dead computer
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Asteroids explode like nuclear blasts in the sky...and that's quite common [VIDEO]
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KOI-3278, a bizarre 'self-lensing' binary star system, discovered in Lyra
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Scientists spot 'upside-down planet' by accident, discover binary star system 2,600 light years from Earth
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Murmansk meteor strikes fear in Russians, reminds of Chelyabinsk incident
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Impact glass from asteroid traps ancient plant life and has secrets to tell
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SpaceX Dragon spacecraft makes Easter delivery at ISS: What goodies did it bring?
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Lyrid meteor shower: How and when to watch the celestial light show
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Lyrid meteor shower peaks April 22, coincides with Earth Day
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Wobbly or tilting planets may host alien life-forms, new study suggests
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