One of them, suspended from the ceiling, serves as a compass, magnetically aligning itself with the gallery's north - south axis; the other, comprising 24
solid glass spheres, multiplies the image of its surroundings and, like a lunar cycle, gradually compresses it.
That type of sensor consists of
solid spheres and is not compatible with microfabrication methods, but recently Tadigadapa and his team developed an innovative way to grow on - chip
glass microspherical shells with incredible sensitivities that potentially can be used for motion, temperature, pressure or biochemical sensing.