The “Tree of Faces” Optical Illusion Is Back An old puzzle from the 1880s, the “Tree of Faces,” is puzzling the internet again. At first glance, it’s just a tree—but look closer and you’ll spot 10 or more hidden faces, possibly of world leaders. Why is it still popular? It challenges how we see, sparks curiosity, and exercises our brains. In a fast-paced world, this classic illusion reminds us how much we still love a good mystery. Can you find all the faces in under 10 seconds