Anyone who has seen a V-shaped flock of Canada geese overhead on a fall day generally stops whatever they’re doing to look up in wonder.
But what a V?
European ornithologists studying flight films of an endangered species, the northern bald ibis – the bird of ancient Egyptian hieroglyphics -, came to the conclusion that it’s simply the most aerodynamically, energy efficient way to fly.
Here’s an article about it: http://www.nature.com/news/v-is-for-vortex-1.14507
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