It simply always existed.

Jensson · 2024-01-31T17:00:27.000000Z

If the universe has existed for an infinite amount of time it means there has to be some process reversing entropy, events reversing entropy are about as magical as an event creating the universe from nothing so not easily believable either.

PrimeMcFly · 2024-01-31T17:38:24.000000Z

> there has to be some process reversing entropy

That's true in our universe, not necessarily in others and certainly not in a universe containing our universe.