Account-1: @PCKnappenberger (Twitter)Account-2: @PCKnappenbergerScholar: Knappenberger, Paul C. "Chip"Date: Friday, April 22, 2016Retweets: 25 retweets(Twitter) Likes: 12 likesBody: A couple of my favorite #EarthDay charts, courtesy of @humanprogressLink: https://twitter.com/PCKnappenberger/status/723499004764397568Social Action: authored a viral tweet