Mood Meter Tracks Smiley Tweets and Frowny Tweets
A billboard for JELL-O stands at the corner of Grand Street and West Broadway on August 2 in New York City. The billboard acts as a mood-meter by analyzing Twitter and gauging the number of happy and sad emoticons used at any given moment, causing the billboard’s face to change between a smile and a frown. (Andrew Burton / Getty Images)
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