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The Mysteries of Optic Flow

Birds use a trick of the eye called "optic flow" to zip through forests without colliding.
Publish Date: Topic: NatureNatureNova
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How do birds manage to fly through narrow spaces without constantly bumping into trees or buildings? It turns out that they use a trick of the eye called optic flow. Understanding what optic flow is and how birds use it could help us build a safer world for our feathered friends.

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