What Existed Before the Big Bang

Modern science explains the origin of the universe with the Big Bang theory:  Our world arose from the explosion of singularity…

…or a point in space-time where energy, density, and mass go to infinity, and any dimension goes to zero. It’s a point where there’s no space, time, or matter.

So where did this singularity come from, what preceded it, and what triggered the countdown to the Big Bang?

What Existed Before the Big BangWhat Existed Before the Big Bang

[Youtube]