When you watch a movie in 3D, you wear funny glasses with one red lens and one blue. Every shape in the movie is drawn in both blue and red, with each blue shape shifted to the left. The bigger the gap between them, the bigger and closer that object looks. Scientists wondered whether insects see in 3D, so they tried out tiny 3D movie glasses on praying mantises -- and the answer was yes. Of course, now those bugs want to watch our movies!