What force is it that defines the direction things buoy in...? In zero-G, You can put water on a piece of wood, and the water will flow around the wood until You have a bubble of water with a piece of wood in the middle.

I call that force "gravity."

What is mis-grasped is the nature of that force - it is part of the electro-gravito-magnetic makeup of the universe.

And I ponder that Japanese experiment. I wonder which direction works south of the equator....