a massive section of antarctica s ice shelf is hanging on by a thread. according to a new study from nasa the ice shelf could disintegrate completely by 2020. sciencetists say the collapse will undoubtedly contribute to the global sea level rise. 2/3 of it collapsed in less than six weeks. and the intervening period between 2002 and now the remaining part has been weakening very, very quickly. we expect it to not last for more than a few years to come. the larson b ice shelf lasted for 10,000 years. but began to shatter 13 years ago. some have thinned by 72 feet. the science is clear. climate change is altering our environment at an alarming rate. over the next few years, an entire ice shelf will collapse before scientists eyes, but