Mighty Illusions has a neat psychological illusion. Take a look at these photographs of Maggie Thatcher. You'll note that they're not quite the same. But when you rotate them 180 degrees, the differences appear much more pronounced. Link
Mighty Illusions has a neat psychological illusion. Take a look at these photographs of Maggie Thatcher. You'll note that they're not quite the same. But when you rotate them 180 degrees, the differences appear much more pronounced. Link