A wonderful public art installation created by Greyworld that appeared for one day only in London's Trafalgar Square, which took six months to create, is 30,000 times bigger than a football, has a surface area of 200m2 and weighs over 2,500kgs. Its internal light source produces 4-million lumens of light, the equivalent of 60,000 light bulbs, making the artwork visible from space. For more information & videos see http://greyworld.org/archives/1108