Ask HN: Most interesting/contoversial/wow article on HN You've ever read

Hi everyone! I would like to know, which articles had a great influence on You (they were most insteresting/controversial or just make-You-wow articles You've ever read here)

I'm asking this, because one of yesterday's articles was one of the most interesting/frightening I've read here (it was about "Going undercover as a sex worker" - I've never thought that there such bestiality in that business)

BTW. I'm not asking for more such articles - to be hones I hope that there will be more optimistic articles that restores my faith in humanity :)