Image courtesy of Phaidon, from the new book, “Living in the Endless City.”

10% of the world lived in cities in 1900. That number grew to 50% in 2007.By 2050, 75% of us will be in cities. Oh, and cities only constitute 2% of the Earth’s surface. .

It’s fascinating stuff, and a great read for anyone interested in the new realities of shared urban space.