Nature, Published online: 19 August 2026; doi:10. 1038/s41586-026-10900-1 Mice spontaneously form leader and follower roles during cooperation, and the medial prefrontal cortex encodes these role dynamics and an egocentric social value map of the partner’s position.
Source: [Nature](https://www.nature.com/articles/s41586-026-10900-1)