Facebook has fed everyone's public posts into its search engine, meaning that most updates will now be readily available for everyone — no matter how old they are.
The move follows an update last year that made all individual posts searchable.
But that was initially restricted only to posts by friends.
Now, 2 trillion public posts from all around the world have been added.
And it's highly likely that any Facebook users' posts have been sucked up in that move.
Facebook hopes that the tool will allow it to become more of a way of finding out what is going on — it will be possible to search for how people are reacting to a news event, for instance, or to find everything that everyone has said about a certain TV show.
It will also allow Facebook to track more accurately what people are talking about, so that its search tools can offer information about what's going on.