MSNBC is reporting that this Antarctic ice shelf, which was 40 x 53 miles in size, has collapsed into the ocean. While this sucks, the danger is that this may be a warning the ice sheets on land, like the much larger Ross Ice Shelf, may be also melt/fall into the ocean in very large chunks. This would substantially raise the ocean level endangering all coastal cities, such as New York, Tokoyo, London and (oh yeah) Boston. Oh, the excess of cold water in the ocean could damage or halt the Gulf stream. That would be bad.