Bill Nye @BillNye
@neiltyson Sailors have known tides since ancient times. We all know gravity, but no one knows its cause. Waves? Gravitons? — PolitiTweet.org
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Mon Dec 03 17:06:08 +0000 2012
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Likely AvailableBill Nye @BillNye
@neiltyson Sailors have known tides since ancient times. We all know gravity, but no one knows its cause. Waves? Gravitons? — PolitiTweet.org