Why dandelion seeds are so good at spreading widely

Why dandelion seeds are so good at spreading widely.
You don’t need a dandelion to know which way the wind blows.
But it can help.
On any given dandelion, some seeds are destined to go north, while others are fated to fly east, south or west, and every direction in between.
In effect, each dandelion seed is programmed to release for a wind coming from one direction and resists winds from other directions, according to research to be presented at the American Physical Society’s Division of Fluid Dynamics in Indianapolis on November 20.
Dandelion seeds are susceptible to different wind directions depending on where they are on the seed head, says Jena Shields, a biophysicist at Cornell University.
The feathery seeds on the side facing a breeze will let go most easily; the others hold on tens to hundreds of times tighter — until the wind shifts.
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It’s a phenomenon that Shields set out to study after her adviser noticed the way dandelions responded as his toddler played with the flowers.