Researchers have determined that the West Antarctic Ice Sheet – one of the largest and most vulnerable ice sheets in the world – formed 20 million years earlier than thought.
Glaciers are essentially giant rivers of ice that are formed over eons as fallen snow is compressed into layers of ice. Glaciers are found on about 10 percent of Earth's land area, with most of them found in the Arctic and Antarctica regions, but some occurring high up on mountains, even in tropical areas. Glacial ice makes up the ice sheets that cover Antarctica and Greenland, with glaciers flowing out to sea, where their ends float on the water as ice shelves. Eventually pieces of the ice shelves break off, or calve, to form icebergs. The movement of glaciers scours the underlying rock, and a glacier's movement can be affected by climate change, with worries that global warming could cause substantial glacial melt and impact global sea levels. For the latest news on glacier research and stunning views of these rivers of ice, see below.
An iceberg larger than the city of Chicago broke off from Antarctica's Pine Island Glacier this week. The newborn iceberg, which measures about 278 square miles, is floating in the Amundsen Sea.
Collecting data on the polar ice sheets will help scientists create more accurate models of global sea level rise.
Antarctica was flat, warm and crisscrossed with rivers before glaciers buzz-sawed its steep valleys.
Past increases in carbon dioxide levels in Antarctica were tied to warming temperatures, suggesting modern greenhouse gas emissions may cause similar warming
Daily satellite data updates, loads of historical data and up-to-the-minute analysis help make this website the go-to place for info on Earth's second largest block of ice.