This photo technique has precursors that date all the way back to work by Leonardo da Vinci in 1485.

The next time you are at the mall, you know what to do.

Also known as "Be a Man" campaign, this Iranian fashion protest is a prime example demonstrating that not all photo fads are for kicks and giggles.

Similar to sleevefacing, moneyfacing reveals a strange “hybrid face” of the subject and famous person depicted on the banknote.

If the number “241543903” means nothing to you, type it into Google Images and see what happens.