From Popular Mechanics:
In the last million years, the North American ice sheet has formed and completely melted about 10 times. Ice is melting once again—simultaneously, across the globe—and the science research vessel and drilling ship JOIDES Resolution has been seeking out clues to how ice sheets may respond to a warming climate. Onboard in Antarctica, Trevor Williams reports on the role that ice has played throughout geologic history and what a new iceberg in the Southern Ocean can tell us about the future for the planet.
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