Fluorescence microscope image from a video showing the dynamics of active nematics confined to a cardioid along with the tracks of three defects, which form a braid. Selected for an Editors’ Suggestion.

From the article:

Controlling Chaos: Periodic Defect Braiding in Active Nematics Confined to a Cardioid
Fereshteh L. Memarian, Derek Hammar, Md Mainul Hasan Sabbir, Mark Elias, Kevin A. Mitchell, and Linda S. Hirst
Phys. Rev. Lett. 132, 228301 (2024)

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