Karl Hale builds “kinetic sculptures,” beautiful works of wood that combine an artists’s eye with an engineer’s mechanical genius and a woodworker’s skill. This one, called “One Eternal Round,” makes marbles climb, fly, and follow labyrinthine tracks in an endless dance, with every last piece made from solid wood.

Clearly Hale has gone to school on mechanical marvels of times past, as he employs many of the fascinating tricks, flips, and toggles I’ve seen in other perpetual-motion machines, combined in a very original way, and presented beautifully in this gorgeous video.

One Eternal Round, a kinetic sculpture by Karl Hale.