An optical illusion is a short, playful puzzle designed to make your mind stretch and smile. It could be a riddle, a tricky question, a visual illusion, or a logic twist that nudges you to think ...

Sudoku is a logic-based number puzzle played on a 9x9 grid, divided into nine 3x3 subgrids. The goal is to fill the grid so that each row, column, and 3x3 box contains the numbers 1 through 9 exactly ...

Guest post by Jason Major, a PhD candidate in Psychology at the University of Edinburgh. He is from Ottawa, Canada. About a month ago, Sanjay Srivastava, a psychologist at the University of Oregon, ...