You probably don’t always like/share/comment on the stuff that pops up in your Facebook feed, even if it’s something you care to see. Take, for example, a breaking news items about an earthquake on the other side of the world — you’d probably feel weird hitting a button labeled “Like” on that one, and you might not have anything to say… but that doesn’t mean you don’t care. Realizing this, Facebook is tweaking its algorithms to account for a new metric: the amount of time you spend looking at things in your feed, regardless of whether or not you actively interact with it. Scroll past something without stopping for long, and Facebook’s algorithms will slowly learn that you don’t particularly care for that sort of content. Camp out on a post for a bit, though, and Facebook starts the timer behind the scenes. If you spend more time on this story than you spend on most things in your feed — studying a picture, perusing the comment thread — they’ll take that as a signal that it’s