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A comment on NASA’s Kepler Mission Discovers Bigger, Older Cousin to Earth. Parent comment

Re:NASA’s Kepler Mission Discovers Bigger, Older Cousin to E... by semi-extrinsic on Thursday July 23, 2015 @07:48PM (#9939216)
On those timescales mass extinction events (asteroid, supervolcano etc.) become rather probable, which I guess could be what GP was trying to say.
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Re:NASA’s Kepler Mission Discovers Bigger, Older Cousin to E... by pdonis on Friday July 24, 2015 @12:56AM (#9940178)
A mass extinction event would mean there wouldn't be a civilization on the planet at all. That's certainly possible, but for this particular subthread I am taking as a premise that there is a civilization there.
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