MIT researchers revive 40 year old triangular zipper concept(tomshardware.com)

https://www.tomshardware.com/3d-printing/mit-researchers-revive-40-year-old-triangular-zipper-concept-now-made-possible-by-3d-printing-creates-shape-shifting-robots-and-deployable-structures-3d-printed-y-zipper-turns-floppy-tentacles-into-rigid-beams-in-seconds