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- CelebrateSagan: RT @SETIInstitute: Closer look at cosmic impacts: moon-crater survey could improve solar system dating http://cot.ag/bnk8tw July 31, 2010
- CelebrateSagan: RT @BoingBoing: Bitten by a radioactive Carl Sagan http://bit.ly/d9ggxq July 31, 2010
- CelebrateSagan: Certainly no #Cosmos, but it is a fine, if sensationalist, overview of #BlackHoles - http://bit.ly/afAZ6x July 31, 2010
- CelebrateSagan: Kepler Mess: We Could Certainly Use Carl Sagan Right Now - http://bit.ly/9qWTU3 July 31, 2010
- CelebrateSagan: RT @SETIInstitute: The Starwomb project – a sound sculpture of star formation! http://cot.ag/d64V8S July 31, 2010
