Why Time and Space swap in a Black Hole

What is the difference between time and space? Why do time and space swap roles in a black hole? What is a Penrose diagram? All these answers in 12 minutes! 0:00 - Light cones 2:45 - Space and time 4:56 - General relativity 6:20 - Black holes 10:13 - Collapse diagrams This video is narrated by Oct...