Some scientists say a collapse is inevitable, possibly even imminent.
Click on the images below to get a look at selected coasts in the aftermath of such a melting. While you're at it, check out the same stretch of coast 20,000 years ago. It was the height of the Ice Age, when sea levels were 400 feet lower than today, and there was a lot more land to go around. Finally, if you dare, have a look at what would be lost if the East Antarctic Ice Sheet were to melt. No one believes this monstrous dome will disintegrate anytime soon.