Engadget - At the end of every year, Twitter loves to compile highlights from the previous 12 months. Its army of engineers and analysts look at the trends, the most popular retweets and new tweeters with an impact. Then all that info is packaged up in an easy to navigate standalone site that presents the world through a hashtag-tinted lens. 2012 had plenty of interesting moments, punctuated by status updates from the bottom of the sea and the surface of the red planet.
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