Four hearts, joined together in a row. But when viewed from the other side, or viewed in a mirror, the four hearts turn into the four suits, diamond, heart, club and spade. How is that possible? In fact, there is another subtlety going on - the heart is the right way up, whichever way you look at it!
Created by Kokichi Sugihara, a Japanese mathematician and artist known for his three-dimensional optical illusions. His illusions, which often involve videos of three-dimensional objects shown from carefully chosen perspectives, have won a number of awards at the Best Illusion of the Year Contest.
It is 8cm wide.
