People try to change the light pattern of the Science World museum building by touching an interactive art device in Vancouver, Canada, Aug. 3, 2018. The interactive art installation, a scaled model of the Science World's geodesic dome, is covered with 240 sensors and LEDs and can sense the movement of people's hands, altering the lights on the building in real time. This public free art installation allows people to take control of the lights of this iconic building in Vancouver. (Xinhua/Liang Sen)