@Revkin tweets related to: Asteroid, Encounter, Earth, Closer, Satellites

Bill Marsh/The New York Times Amid all the progress on this planet - declining losses from terrible diseases and war, rising literacy and the rest - there remain plenty of planet-scale risks requiring serious focus, from pandemic flu to centuries of locked-in climate change to, yes, collisions with space rocks.
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Reflecting on Asteroid #2012DA14 Really Close Encounter with Earth (Closer than Some Satellites) http://t.co/QeOUa4XY @asteroidwatch

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