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http://en.wikipedia.org/wiki/Panspermia http://en.wikipedia.org/wiki/Panspermia

• AnimalMuppet 12y ago
  Panspermia has nothing to with where the water came from.
  • Balgair 12y ago
    http://www.nature.com/news/dna-has-a-521-year-half-life-1.11555 http://www.nature.com/news/dna-has-a-521-year-half-life-1.11... DNA has a 'half-life' of ~500 years. Panspermania may still be a viable theory, but it is very restricted in terms of stellar distance/time in transit.
    • CamperBob2 12y ago
      That's at (or near) STP, though.
      • gpvos 12y ago
        What's STP?
        • arethuza 12y ago
          Probably "Standard Temperature and Pressure": http://en.wikipedia.org/wiki/Standard_conditions_for_temperature_and_pressure http://en.wikipedia.org/wiki/Standard_conditions_for_tempera...
      • Balgair 12y ago
        Very true, but getting this data in a vacuum and in a stellar radiation environment is tough. Who knows what the preserving effects of space are like to DNA. However, one data point is better than none.