“There was no time before big bang” – what does that mean?

Question

“There was no time before big bang” – what does that mean?

In: Physics

Answer 1

The idea is that the big bang is everything and before that there was nothing. Which means time didn’t exist either. No universe, not even an empty blackness–true nothing.

Try to remember what it was like before you were born. I imagine that’s pretty close to what the universe was like “before” the Big Bang.