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Praying Mantises Wearing 3D Glasses

Most predators use stereoscopic vision for depth perception, including cats, dogs, and humans. We have two eyes facing forward, and the difference between the images that are perceived by each eye give us clues about how far away an object is. But what about predatory insects? To find out, researchers put tiny little 3D glasses on praying mantises. Really. Birds and mammals can see in 3D using the differences between the images observed by each eye.
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