Slovakian artist Roman Ondak's interactive installation titled Measuring the Universe started as a blank white room and evolved into a room with a strip of celestial black marks all around the gallery space at Tate St Ives. Through the participation of over 90,000 visitors measuring themselves and marking it on the walls, spectators get a visual sense of the space each of us takes up in this vast universe. It's a reflection of physical occupied space as well as interconnectivity. Each person serves as a star in a network of celestial bodies or constellations. It's also interesting the way this project has organically evolved into a sparse series of black marks on white walls that resemble a galaxy whose monochromatic scheme has been reversed.