Twitter now has more than half a billion accounts worldwide

A milestone for Twitter today, according to the Paris-based analyst group Semiocast. The social network has now passed the half-billion account mark — specifically 517 million accounts as of July 1, 2012, with 141.8 million of those users in the U.S., still about half as many users as Facebook has but positioning it as the second-biggest …

A century of Olympic posters

    Images from the book “A Century of Olympic Posters” by Margaret Timmers: As snapshots through time, Olympic posters provide a fascinating record of our world, a lens through which we can explore links between sports and art, politics and place, commerce and culture. A Century of Olympic Posters offers an intensely visual representation of the modern …