Oscillations in concentration (represented by color) of a reaction product induced by Marangoni- and buoyancy-driven convection. Vertical axis is time, pointing down. Horizontal axis is space. Selected for an Editors’ Suggestion.

From the article:

Making a Simple $A+B\to C$ Reaction Oscillate by Coupling to Hydrodynamic Effect
M. A. Budroni, V. Upadhyay, and L. Rongy
Phys. Rev. Lett. 122, 244502 (2019)

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