Originally posted by Ryzilynt:

There was an old PS1 game called Discworld that explained this concept rather well, it was voiced by Monty Python's Terry Pratchett.

also apparently a comic :

https://en.wikipedia.org/wiki/Discworld

even better (the intro from the game) :

https://www.youtube.com/watch?v=Q1CtIcInJSw

Discworld is a book series written by Terry Pratchett, the games main character is voiced by Monty Python's Eric Idle.