My wife served me divorce after we return from a family vacation.

Having read more than a few like this, it’s interesting that if you swapped the genders the top-voted reactions would be much different.

This one: Wife abandons family. Man presumed to be at fault, wife given every excuse/justification with no evidence. (Maybe he is at fault, but this is not about blame.)

Gender swap: Husband abandons family. Man would still be presumed to be at fault, and a monster.

This is what I mean that the cultural conversation is largely controlled by women now. Obviously, I do not mean that women hold all positions of power. That’s clearly untrue. However, this means that now women’s narratives and priorities are the dominant ones in the cultural norm-setting sense.

Which is also obviously the case.

How far back in time could I theoretically travel before I would no longer be able to breathe the current atmosphere?

Another person answers fairly accurately. The answer is around 500 million years. (Adapted humans can survive on a bit less than 10% oxygen, though, so could go back further.)

There was some stupid book I was reading where a team went back a billion years into earth’s past with no protective gear. The O² percentage would’ve been around 2.5 percent then at sea level, meaning death within 5 minutes or so.

I did not keep reading that book.