The Greenland ice sheet collapsed 400,000 years ago causing worldwide sea levels to rise between 13 and 20 feet.
Rachel Sussman spent a decade traveling to remote locations around the world to photograph continuously living organisms that are 2,000 years old and older.
Greenland's two record-shattering surface melts, though more than a century apart, were both triggered by U.S. heat waves.
Jakobshavn Isbrae glacier broke its own speed record again, quadrupling its summer run to the sea between the 1990s and 2012.
The discovery of an aquifer the size of Ireland is likely to cause major changes in understanding Greenland's role in rising sea levels.
The age of discovery isn't over yet. A colossal canyon, the longest on Earth, has just been found under Greenland's ice sheet.
Greenland glaciers aren't just melting; they are falling apart, driven by warming ocean currents as well as warming air.
Environmental groups worry that Greenland's tiny population of Europeans and Inuits may end up on the losing side of that raw material diplomacy.
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