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by AnimalMuppet 4215 days ago
Panspermia has nothing to with where the water came from.
1 comments

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.

That's at (or near) STP, though.
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.
What's STP?
Probably "Standard Temperature and Pressure":

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