Nothing can warm the frozen wiring of your brain on a cold winter morning like a cheerful Christmas-y puzzle. But as much as you'd like to think that it's easy to spot one panda amidst a sea of smiling, carrot-nosed snowmen, it's actually pretty frustrating. Hungarian artist Gergely Dudás (also known as Dudolf) shared this puzzle last Wednesday and people just can't stop staring at it.