How did the universe begin?

In this video I go through the different theories which physicists have for how the universe began.

To learn more about inflation and the inflaton field, this is an excellent starting point:



Here is more about the Ekpyrotic Universe:



I wrote about Penrose's Cyclic Cosmology here:



You find more about the idea that universes are born inside black holes in Zeeya Merali's book:



The idea that the universe started from a 4+1 dimensional black hole is explained here:



I have explained the idea of "Asymptotic Silence" here



Finally, the theory of String Gas Cosmology is from Robert Brandenberger:

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