Nature World: What would Earth look like if we continue to burn all available fossil fuels, causing global temperatures to increase by 20 degrees Fahrenheit? That's the question University of Alaska Fairbanks researchers set out to answer by applying a new computer model that focusses on the Antarctic ice sheet.
The Antarctic ice sheet is larger than the U.S. with an average thickness of 6,200 feet and all by itself contains more than 50 percent of the world's fresh water. If it melted, sea levels would rise...