In Mrs. Escher’s Nightmare, a hand appears to draw 3D-objects… as they move! Escher’s paintings were famous for mind-bending, physics-defying imagery. This demonstration of concept software makes it look like something that should exist, and be user-friendly. Watch black and white geometric shapes come into being, float off into space, become an eagle and flap its eagle wings, all the while interacting with the human hand that draws them. The video was produced by Andromeda Software Development, a group that formed in Greece in 1992. (Gif: Prosthetic Knowledge)