The Falcon has landed. On a moving barge in the middle of the ocean.
This is the second successful landing of a SpaceX Falcon 9 rocket, the first was on land. The ability to return a Falcon 9 to earth, landing on a barge, is critical to plans for reuse of the Falcon Heavy rocket. View the video below.
For more info, take a look at the the SpaceX discussion board on Reddit.