The Source

The Source, in the main atrium of the new London Stock Exchange. A cube of 9×9x9 (729 in total) spherical balls are suspended on strings that stretch 32 metres up to the top of the main atrium of the newly designed building. These balls can reposition themselves independently of each other, forming dynamic shapes and fluid-like motions.
more
Chris O'Shea's interview with Andrew Shoben of Greyworld