A Kinetic Artwork that Sorts Thousands of Random River Stones by Age

Performing the role of a scientist, Benjamin Maus and Prokop Bartonicek’s kinetic machine Jller selects and sorts pebbles found on a 6 1/2 x 13 foot platform into a grid organized by geologic age. Without assistance, Jller analyzes the stones’ appearance to understand their correct placement, then transports them to the correct location.
All of the rocks for the project were extracted from a German river of the machine’s own name, pebbles that are either the result of erosion in the Alps or have been transported by glaciers. More