Plus Advent Calendar Door #10: What is a block universe?

Could it be that the present, future and past all exist at the same time? According to Einstein's theory of relativity they might well do. In this video Marina Cortês, cosmologist from the Royal Observatory, Edinburgh, explains the concept of a block universe, the arguments for and against this theory, and alternative explanations of the world.

You can also watch this interview as a series of shorter clips:

You can read more in our package of articles Stuff Happens: Time in a Block Universe.

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