The volume on popular photo sharing site like Flickr and Instagram is dwarfed by photo activity on Facebook , according to photo-sharing site 1000memories. Facebook hosts 140 billion photos, and will add 70 billion this year. That means that Facebook is hosting an amazing 4% of all photos ever taken, according to 1000memories who estimates 3.5 trillion photos have been taken through history. The Chart:

via Silicon Alley Insider