(Left) A dandelion seed in a wind tunnel, with added clouds for effect. (Right) The same dandelion with the flow around it visualised using a laser sheet (contrast enhanced), showing the formation of a drag-enhancing vortex unlike any other observed before in nature, which we term a 'halo' vortex.
'Halo' vortex ring lifts dandelion seeds —Cathal Cummins, Madeleine Seale, Enrico Mastropaolo, Naomi Nakayama & Ignazio Maria Viola, University of Edinburgh

(Left) A dandelion seed in a wind tunnel, with added clouds for effect. (Right) The same dandelion with the flow around it visualised using a laser sheet (contrast enhanced), showing the formation of a drag-enhancing vortex unlike any other observed before in nature, which we term a 'halo' vortex.

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