The West Antarctic Ice Sheet, which cover 740,000 square miles, has been shrinking for the last twenty years.
According to A.
Shepherd, a geologist at University College London, this is due to the fact that the Pine Island Glacier, a part of the sheet, is moving faster than before.
If the sheet were to melt completely, sea levels could rise by as much as 25 to 40 feet; but Shepherd believes that there is no need for immediate concern because it would take hundreds of years for this to happen and have an impact on sea levels.