> Many insects harbour such filter-like structures on their wings or legs, suggesting that the use of detached vortices for flight or swimming might be relatively common
I sense a bit of disconnect between the article and the headline.
> When some animals, aeroplanes or seeds fly, rings of circulating air called vortices form in contact with their wings or wing-like surfaces.
> Researchers thought that an unattached vortex would be too unstable to persist in nature.
I guess those animals and seeds aren't natural then?
> Many insects harbour such filter-like structures on their wings or legs, suggesting that the use of detached vortices for flight or swimming might be relatively common
I sense a bit of disconnect between the article and the headline.