Question

if the universe was born at the big bang what existed before then?​

Answer 1

Answer:

Before the big bang, the universe existed as an incredibly small singularity. ...

Explanation:

The initial singularity is a singularity predicted by some models of the Big Bang theory to have existed before the Big Bang and thought to have contained all the energy and spacetime of the Universe.

Answer 2

Answer:

the initial singularity is a gravitational singularity predicted by general relativity to have existed before the Big Bang and thought to have contained all the energy and spacetime of the Universe

Explanation: