Just the fact they say only a couple hundred years basically everything will have crumbled to the ground & under 1000, mans existence will be hard to detect. That just amazes me that it would/could happen that fast.
It almost makes me wonder if it has happened before and we just don't realize it. I also wonder if it's not inevitable that it will happen. Like maybe it's part of the natural order of things that we would rise up and then be wiped out.
The earth would be returning to it's natural state, so to speak.