The key question then is how to humanize such mega-cities, the theme of the upcoming New Cities Foundation summit that Sao Paulo is hosting in June. (Full disclosure: I serve on the NCF board of trustees.) The reinvention of Sao Paulo will begin right at its center with projects such as the URBEM Foundation's Casa Paulista.

CNN: Is Brazil ready to take sporting center stage?

The London summit kicks off the Foundation's official campaign for support and funding for that effort.

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From a research station operated by the National Science Foundation called Summit Camp, a spot where the ice sheet is about 2 miles thick, GROVER will crawl at an average speed of 1.2 mph (2 kilometers per hour).

ENGADGET: NASA's GROVER eco-rover to examine Greenland's ice sheet (video)