Mantis at the Movies: Tiny Specs Reveal Bugs' 3D Vision

By fitting praying mantises with teeny, tiny glasses, scientists have proved that these insects have 3D vision. To determine whether insects use 3D vision to hunt, Read and her colleagues had to come up with a way to show mantises both two- and three-dimensional images. Modern 3D glasses, like the ones people might wear to go see "The Force Awakens" in 3D IMAX, didn't work, because the mantises were too close to the screen.