Contents

21 July 2021
Vol 6, Issue 56

About The Cover

Cover image expansion

ONLINE COVER Opening Doors. Robot swarms are designed to achieve complex global behaviors through simple local interactions between robots with very rudimentary sensing and locomotive abilities. Boudet et al. demonstrate that a swarm of primitive, centimeter-scale, vibrating robots bound by a deformable metal scaffold can give rise to directional motion. The mechanically coupled motion of the simple robots and the scaffold enable nontrivial space exploration in specifically configured environments. This month's cover is a photograph of a swarm of simple robots in a flexible membrane passing through a door. [CREDIT: HAMID KELLAY, JEAN FRANÇOIS BOUDET, BENJAMIN GORIN/UNIVERSITY OF BORDEAUX]