Movie S5.

Propagation of activity in the dense network at E/Ec = 0.9. The movie runs for 0.8s of real time. The field of view is 420 × 420μm2.

Activity waves and freestanding vortices in populations of subcritical Quincke rollers

Zeng Tao Liu, Yan Shi, Yongfeng Zhao, Hugues Chaté, Xia-qing Shi, and Tian Hui Zhang

PNAS. 2021. 118:None-None DOI: 10.1073/pnas.2104724118