The Decline and Fall of Assorted Empires

A visualization of four European empires over the course of the 19th and 20th Centuries:



The bubbles respresent "the evolution of the top 4 maritime empires of the XIX and XX centuries by [areal] extent"; hence Britain's loss of Canada looks like a more significant bursting of the imperial bubble than its loss of India, even though India is obviously a far more important place than Canada.

Via Andrew Sullivan and 3quarksdaily.