After record-breaking amounts of sea ice in Antartica, this year we're seeing record lows.
New projections suggest the world could warm 3-7 degrees over coming centuries.
A glaciologist develops a lightweight method for probing the depths of Greenland's ice sheet to answer a crucial question: How fast is it melting?
Buried beneath kilometres-thick slabs of ice are rivers and huge lakes - some of which are teeming with microbes that thrive in a world without light or oxygen.
Polar ice isn't all the same - it can be divided roughly into "land ice" and "sea ice". What matters most for sea levels is how much ice slides off the land and melts in the sea.
New mapping shows how Antarctica's huge Totten Glacier has retreated far inland, raising sea levels by more than a metre. Rising temperatures could trigger it to do so again.
Could sea levels really rise by several metres this century. Probably not, although this century's greenhouse emissions could potentially set the stage for large rises in centuries to come.
As the world warms, Antarctica's melting ice will likely reach the point of no return.
Ice cores tell us vital information about how the world's climate has changed - and how it will change in the future.
The way ice sheets respond to global warming may be more predictable than previously thought