Neil deGrasse Tyson @neiltyson
Hope for America: The September 4th @Yankees Stadium giveaway for kids is a "Math Drill" calculator with a Pi button. — PolitiTweet.org
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Sat Sep 03 18:18:02 +0000 2011
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Likely AvailableNeil deGrasse Tyson @neiltyson
Hope for America: The September 4th @Yankees Stadium giveaway for kids is a "Math Drill" calculator with a Pi button. — PolitiTweet.org