ONLY the most eagle-eyed will be able to spot the 13 hidden faces in this devilishly difficult optical illusion. Put your vision to the test with this tricky brainteaser, which will have you ...

is shown in this still from "Hidden Face," provided by NEW. (PHOTO NOT FOR SALE) (Yonhap) The film is a Korean adaptation of the 2011 Spanish-Colombian movie of the same name, incorporating ...