If the universe can create itself from absolutely nothing (Big Bang), then it can again when this universe ends. Which means that before our universe was here, another universe was before us that was created from another Big Bang.
Now before I continue, you must assume two things.
1. Time is infinite. (Infinity = represents something that is endless)
2. Such thing as absolute zero = no energy, light, darkness, gravity, time ect.
So if time is infinite and our universe can come from absolute zero then that must mean when our universe finally closes another one will begin at some point (the time in-between our universes close and the nexts creation may be unimaginable and trillions to the power of decillions of years longer than the universe itself. But because time is infinite IT WILL HAPPEN)
Which means this can happen over and over again backwards and forwards in time for infinity.
Meaning there is an infinite amount of universes before us and after us.
Meaning every single possibility as happened before an infinite amount of times and will happen again and infinite amount.
Meaning a very long time ago you have read this same text but in your friends house or enemy’s house or in a different coloured shirt or as a Martian or as a walking talking sunflower every single physically possible thing has happened before, and it will all happen again
Even if you don’t believe in Big Bang and multiple universes, then our universe is infinitely never ending. Meaning carbon copies of us exist out there and are being constantly created around the universe
Keeps me up at night sometimes