Sunday, Nov 19 2017 | Updated at 08:42 PM EST

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Video shows the breakup of Pine Island Glacier

In 2015, a 225-square-mile iceberg broke off of the Pine Island Glacier in Antarctica, and researchers at The Ohio State University have discovered that the event was no ordinary breakup. The culprit: a deep subsurface rift that cracked through the ice nearly 20 miles inland – a sign that the largest ice reserve in the world may be melting sooner rather than later.

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