The scorch marks indicate that this booster has already made the journey to space and back.
Is this some weird alien language? Are the predators trying to communicate with us? While we're not sure what this marking is (but are definitely sure it's not aliens), it does make for interesting speculation.
A close-up view of the grid fins. If you look closely you can see the booster's designation: "46," for B1046.
MP payload fairing
Tucked inside this fairing is the Indonesian telecommunications satellite Merah Putih.
Launch take two
The second flight of SpaceX's first Block 5 first-stage propels a Falcon 9 rocket into space on Aug. 7, 2018.
Return to Space
The second launch of SpaceX's first Block 5 Falcon 9 booster delivered the Merah Putih communications satellite into orbit for PT Telkcom Indonesia.
Streaking Back to Space
This long exposure shows SpaceX's first Falcon 9 Block 5 as it streaks back to space.
The Block 5 Falcon booster spawned a vast plume as it lifted off on its second flight. SpaceX planned to launch the booster at least three times in 2018.
Booster in port
The booster arrived in port just a few days after launching. Crowds of people awaited its arrival, hoping to get the first glimpse of this veteran spacecraft.
Booster legs and workers
Crews work to prep the booster for removal from the drone ship. Tiny humans help to provide a sense of scale for the massive booster.