Many theoretical physicists believe the universe could end someday – and the process is likely to have already begun.

While no one knows for certain how it will happen, there are three leading theories dubbed the big crunch, the big rip and the big freeze, that could lead to our demise.

Now a Munich-based group, called Kurzgesagt, has put together a video explaining how exactly these theories will bring to end the world as we know it.

To read more and view the video, click here.