Off-topic: I posted this yesterday, it didn't get many votes (probably because posting longform articles on autism may not get much readers during the work day)...but suddenly it's (my submission, not someone else's resubmission) is on HN's front page...Despite it being a day old? I think karma-gravity formula may be off...?

note to downvoters: I'm not complaining about not getting upvotes for a day-old submission. I'm confused as to how my day-old submission is suddenly, as of 10 minutes ago, on the front page?