Over the past week, some Facebook users have flagged up a mysterious rocket-shaped icon inside the social network's mobile app.
After some digging, it appears Facebook is testing new ways to deliver the homepage news feed, and by hitting the button, users can now find popular posts from people and pages they haven't befriended or liked.
As well as bringing up content relevant to location, stories will also appear based on the user's "liked" pages and interests. It's a little like Instagram's "Explore" function.
What's more, it appears the new function's layout differs depending on the users operating system. Those on Android will see the stories side-by-side in the traditional style, while Apple users will be greeted with a series of smaller, magazine-style thumbnails.
Facebook has been busy of late, having just released a messenger update that allows you to share your real-time location with friends. Prior to that, a "dislike" feature was also revealed to be in the testing stages.
It remains unclear as to whether the rocket button will be rolled out in full, but stay posted for further information as it emerges.
In other news, Pornhub's April Fools' Day prank caused people to lose their shit.