In 1923, at age 25, Escher wrote,“I want to find happiness in the tiniest of things—a minute moss plant, 2 centimeters across, on a...

Is the pebble two-dimensional and drawn onto the paper, or is it a three-dimensional pebble sitting on top of the sheet as a paperweight?...

What do you think of when you try to conceptualize nothingness? Is it the black depth of deep space? Or the emptiness of a white piece of...