Scientists set sail on expedition to investigate `Iceberg Alley` off Antarctica
(World News Science)

The 5.4 million-square-mile Antarctic Ice Sheet is the greatest mass of fresh water on Earth. If it all were to melt, it would raise global sea levels some 220 feet. Searching for answers to how fast the ice might react to changes in climate, scientists are now studying how that ice reacted to past warm periods similar to today`s. ......