Challenge your cognitive abilities with this perplexing optical illusion! A grid of seemingly random letters hides a clever secret: one letter of the alphabet is conspicuously absent. Designed to ...

Okay, it’s time to give your brain a serious workout—and no, we’re not talking about Sudoku or those “count the triangles” puzzles. This is one of those sneaky, maddening, “how did I miss that?!” ...