Johannes van Loon. Illustrations for Harmonia Macrocosmica by Andreas Cellarius. Star Atlas. 1660.
In which direction is the cube spinning? Now blink, or look away and look back. Is it still spinning in the same direction?
A Necker Cube is an ambiguous line drawing. Our brain can create different interpretations of it.
This clip was part of the Christmas Lectures 2011 presented by Professor Bruce Hood - Lecture One: What’s in your head? Watch it in full on the Ri Channel.