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natgeofound.tumblr.com/The best of 125 years of National Geographic photos in a Tumblr http://t.co/oJZ8DXqUF8 (trigger warning: quite addictive)
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The best of 125 years of National Geographic photos in a Tumblr http://t.co/oJZ8DXqUF8 (trigger warning: quite addictive)