You've probably seen fictional cloaks that can make people invisible, but now scientists have created a way to mask whole events in time.

A team of researchers at Cornell University have come up with a way to essentially cloak time and space to make a actions appear invisible. It’s an illusion created by light rays.

"You kind of create a hole in time where an event takes place," Alexander Gaeta, director of Cornell's School of Applied and Engineering Physics, told the AP. "You just don't know that anything ever happened."

Check out the video above to learn more.