How certain that we're looking at liquid bodies?
As a general public type with no scientific background, I just wanted to throw out this rather obvious question: Just how certain it is that we're looking at liquid bodies on some of these images. I know it hasn't been 100 percent confirmed, but is there any reasonable doubt about it. For example, with the image attached to the top of this thread it is sort of hard to imagine that it could be anything else. It even looks like waves are lapping the shoreline.