The twirling seeds of maple trees spin like miniature helicopters as they fall to the ground. Because the seeds descend slowly as they swirl, they can be carried aloft by the wind and dispersed over ...
Smoke particles in a wind tunnel illuminated with laser light around a freely flying maple seed reveal a prominent leading edge vortex. The visualization of the leading edge vortex on this and 31 ...
The twirling seeds of maple trees spin like miniature helicopters as they fall to the ground. Because the seeds descend slowly as they swirl, they're carried aloft by the wind and dispersed over great ...
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