A new optical illusion is going viral online, forcing people to put on their thinking caps to solve the puzzle. It shows three straight horizontal lines stacked vertically and asks a basic question: ...

The optical illusion challenge asks players to determine which of two lines is longer in just 10 seconds.

Every so often an optical illusion comes along that actually makes me feel ill. And this is one of them. What appears to be a series of decidedly unstraight lines placed in a wonky grid actually turns ...