Cloud Canyons No.25 evokes aspects of a larger cycle: water combines with soap to create foam, it moves upwards, outwards, curling and arching, puddling before eventually evaporating. Like all matter, the sculpture is guided by the forces of temperature, gravity, atmospheric pressure and humidity, and is somewhat unpredictable. David Medalla has created many of these foam sculptures since the 1960s. Inspired by weather systems and biological processes, he sought to ‘create a work of art that would express and embody the motion of clouds’.