Neil deGrasse Tyson

Neil deGrasse Tyson @neiltyson

@dirttrailhiker @PragmaticSloth Thanks, Micheal, for that backup. Another interesting fact — Earth days were shorter, billions of years ago. Moon tides have been slowing us down the whole time. So a more accurate count is closer to two-trillion. But I felt the precision would distract from the tone. — PolitiTweet.org

Neil deGrasse Tyson @neiltyson

@Dpullen66 But then no driving on cloudy day. Or at night. Gotta store the energy for when you don’t have the Sun. That’s what batteries do, which you can charge by sunlight. But there’s no getting around the storage problem. — PolitiTweet.org