About For TED's 30th anniversary, artists Janet Echelman and Aaron Koblin collaborated to create Unnumbered Sparks, a monumental interactive sculpture in the sky. Choreographed by visitors in real time through their mobile devices, at night the sculpture became a crowd-controlled visual artwork on a giant, floating canvas. The sculpture spanned 745 feet between buildings in downtown Vancouver, Can
![Unnumbered Sparks](https://cdn-ak-scissors.b.st-hatena.com/image/square/3dc3240190fbdc074ad86be77dbe5643864fe00b/height=288;version=1;width=512/http%3A%2F%2Fwww.unnumberedsparks.com%2Fimages%2Ftitle-image.jpg)