Awesome Mathematics

To create this pleasantly hypnotic sequence of sounds, musician Jeremie Carter played 15 different notes on a marimba. He performed each note repeatedly at a rate of 0.2 bpm faster or slower than its neighbor, then edited them side-by-side. He says every time you hear a bell ring, a subdivision has been reached, progressing from quarter notes to various tuplets.

Mathematician Henry Segerman is back with another fascinating mechanism – a six-axis rack. It’s built with a dozen gears and sticks that look like long, green crinkle fries. The combination of parts locks the structure together, and moving any stick makes all of the others move. Like Henry’s other designs, you can download the 3D printer files Printables.