The new gravity data gives us our clearest view yet of the shape of the ocean floor
Satellites Detect 'Thousands' Of New Ocean-Bottom Mountains -- BBC
It is not every day you can announce the discovery of thousands of new mountains on Earth, but that is what a US-European research team has done.
The reason they have gone unrecognised until now is because they are at the bottom of the ocean.
Dave Sandwell and colleagues used radar satellites to discern the mountains' presence under water and report their findings in Science Magazine.
Read more ....
My Comment: The oceans are still a mystery .... but more is being discovered about the oceans everyday.