My Heart Tweets: today i learned how the US mean center of population has been moving the last couple hundred years. it currently moves ~12.8 inches per hour. https://t.co/o7tNxDpX3l

Saturday, January 11, 2020

today i learned how the US mean center of population has been moving the last couple hundred years. it currently moves ~12.8 inches per hour. https://t.co/o7tNxDpX3l

today i learned how the US mean center of population has been moving the last couple hundred years. it currently moves ~12.8 inches per hour. pic.twitter.com/o7tNxDpX3l
— Isaac Hepworth (@isaach) January 10, 2020

from Twitter https://twitter.com/isaach

January 11, 2020 at 05:30AM

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