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One of two underwater gliders is deployed from a research ship into Antarctic waters. NOAA

Waiting for an undersea robot in Antarctica to call home

Sending autonomous vehicles to the Southern Ocean can be fraught with anxiety, especially if one of them doesn't make radio contact when it's supposed to.
Aerial shot shot of the rectangular iceberg found off the Larsen 3 ice shelf. Jeremy Harbeck/AAP

How a near-perfect rectangular iceberg formed

Geometric icebergs can form around Antarctica, although such a perfect rectangle is unusual.
The crack along the Larsen C ice has grown significantly over the past few weeks. EPA/NASA/John Sonntag

Don’t worry about the huge Antarctic iceberg – worry about the glaciers behind it

A huge iceberg is set to break free from Antarctica. While the iceberg isn't hugely concerning, it could herald the breakup of the entire Larsen C ice shelf, which could trigger more sea-level rise.
Where the ice meets the sea: Antarctica’s ice shelves play a key role in how fast ice sheets melt. Antarctica image from www.shutterstock.com

Tipping point: how we predict when Antarctica’s melting ice sheets will flood the seas

As the world warms, Antarctica's melting ice will likely reach the point of no return.

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