How do we truly know it's the end of the world?

Would we ever know?

Or will it be an endless cycle of trying to figure it out and never getting the answer right,

What would the end of the world look like?

Would it be a nuked inhabitable land or something completely wild?

Will we destroy ourselves with climate change before the sun destroys us herself?

Will we ever get the chance to make up there mind?

Will we ever find out what the end is like before it happens?
No