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  Is Mars' Methane Spike a Sign of Life? Here’s How We’ll Know

  

  wired.com

  The Curiosity rover detected a high concentration of methane on the red planet. Two Mars orbiters may soon clarify what that sighting really means.

  Science Science / Space

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  Curiosity's Mars Methane Mystery Continues

  

  nasa.gov

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  Trace Gas Orbiter - Wikipedia

  

  wikipedia.org

  ExoMars Trace Gas Orbiter

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  Curiosity Detects Large Methane Burst on Mars, NASA Orders Follow-Up Testing

  

  americaspace.com

  released its largest puff of methane to date

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