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 Octave Masson.
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Alessandro Roussel,
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To learn more :
https://en.wikipedia.org/wiki/Light_cone
https://en.wikipedia.org/wiki/Penrose...