How to melt a heart of ice

Fish use natural antifreeze

source: James Randerson
New Scientist August 25 2001 p7

Some types of fish found in the Antarctic and Arctic, such as cod, make their own antifreeze. This antifreeze is comprised of glycoproteins that prevents ice crystals from developing in the fishes’ tissues and blood, so protecting their cells structures and membranes from rupturing. Researchers from the State University of New York believe that they can produce this antifreeze in large amounts, because they have developed a stable version of it, which could have a number of applications such as protecting human tissue from damage at very low temperatures.