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];