20 July 2004

					Still in its testing phase, LiTraCon© is a light-conducting concrete stone block. Weird and great. Liquid Stone New Architecture in Concrete National Building Museum, 401 F Street, Washington DC Dazzling array of forms here, in an exhibit designed by Tod Williams and Billie Tsien. Projects range wildly in scope from Santiago Calatrava’s spectacular Auditorio de Tenerife right down to experiments with transparency. Who knew concrete could be fun? Until January, 2005