With or without my current knowledge?
Because I’m pretty sure I could smelt Iron with what I know, and a year or two of experimentation. So the answer would be “ending the stone age”.
Without? I dunno, maybe building traps and snares.
Eh, Pluto isn’t really something proven false, just that we found more objects like Pluto that made more sense in their own category. It’s classification, like there weren’t always separate categories for feature films and short films, there wasn’t a separate category for dwarf planets when it was just Pluto.
Oxford comma is useful. I think what’s getting popular is just complete disregard for spelling and grammar.
I’m also annoyed by PWM artifacts on taillights.
I mean, I have, but I saw this long before he started trying to smelt Iron: https://www.youtube.com/watch?v=RuCnZClWwpQ