mc escher Can you spot all the perspective mistakes in this satirical engraving from 1754? Thom Dunn

graph paper FTW How to draw a 3D cube illusion on graph paper Clive Thompson

perspective "Look again at that dot. That's here. That's home. That's us." David Pescovitz

perspective Bizarre family selfie in which half of man's body has vanished David Pescovitz

lighthouses are nice Two photographers, unbeknownst to one another, shoot the same picture at the same moment Rob Beschizza

perspective A simple comic about keeping things in perspective Caroline Siede