NASA unveils Earth Day 'global selfie' mosaic

May 23, 2014 1:30 AM

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NASA has unveiled its "global selfie", a mosaic of more than 36,000 pictures uploaded to social media showing people and places around the world in commemoration of Earth Day.

NASA asked people on April 22, Earth Day, to upload pictures tagged with the hashtag #GlobalSelfie to social media sites such as Facebook, Twitter and Instagram.

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