San Diego's new Museum of Illusions is meant to mess with your mind and create trippy photo ops. The big picture: The museum opened in Gaslamp last summer as an interactive space filled with optical ...

A magician reveals his visual tricks ...

There are countless types of optical illusions, from the cognitive to the physiological, testing our minds in ways that appear to defy logic. The latest example bewitching the internet is this simple ...

Hidden number and letter optical illusions are some of the most satisfying puzzles because they look unbelievably simple until you actually try them. In this challenge, you are shown a neat grid ...