I ask sincerely, how does this work?
Look at this picture close up and then far away. From close up, it’s Albert Einstein. From far away (15 feet or so), it’s Marilyn Monroe. How? Why? What’s going on here? Where am I?
It also works if you make the picture bigger or smaller. It also works, but not as well, if you squint just right. Unbelievable, huh? Life changing, isn’t it?
Oh wow! I just printed it out, and it works that way too.
I need a nap.