The Yale Percussion Group, hailed as "truly extraordinary" by composer Steve Reich, brings high-energy works by Reich and David Lang to the Galapagos stage. The dynamic ensemble will present the so-called laws of nature, a monumentally virtuosic percussion quartet by Pulitzer Prize-winning composer David Lang. Written for So Percussion in 2002, this piece explores explore the limits of the scientific method through varied forms of fractured repetition, and features instruments built by the percussionists specifically for the piece. These instruments range from tuned metal pipes and planks of wood to teacups and flowerpots. Fresh from their performance of Steve Reich's Sextet in Zankel Hall last December, the ensemble will also perform Reich's Music for Pieces of Wood, a polyrhythmic tour-de-force of sound.