Who says they (humans from the future) didn’t come back and fix all kind of stuff? We’re still around, aren’t we - so it’s working!
Perhaps global warming is a cunning plan to avert the upcoming ice-age…instigated by “future-we’s” .
As to cattle mutilation & anal probes: That’s just the guys from the all gay college joyriding the temporal lab’s time machine. They were/will be/are out for only a night, just visiting lot’s of different times. Boys will be boys.
I am an alien from the futuer. We have changed the spelling of certain words, so “future” is now futuer. Totally dekcuf up if you axe me.
The cattle mutilations are an attempt at communication, since none of us know how to talk or type anymore, having become too lazy.
The anal probes are because I lost my watch last time I was here. Just looking, don’t mind me…