Antarctic ice really is collapsing, oceans' rise unstoppable

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Two groups of scientists report that large parts of the ice sheet in West Antarctica have started to collapse. Global warming is accelerating the pace, they said at a NASA press conference today. They believe the rise of sea levels is unstoppable. NASA's Thomas P. Wagner: "This is really happening. There's nothing to stop it now. But you are still limited by the physics of how fast the ice can flow."

[Photo: Thwaites Glacier, where the research was focused. Image: NASA];