To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1. Here we show the final 33 min—speeded up by a factor 15—from one of the 1-h-long experiments realized with 18-mo-old females. Intermittent collective dynamics emerge from conflicting imperatives in sheep herds Francesco Ginelli, Fernando Peruani, Marie-Helène Pillot, Hugues Chaté, Guy Theraulaz, and Richard Bon PNAS. 2015. 112:12729-12734 DOI: 10.1073/pnas.1503749112 Download Original Video Browse All Videos »