A massive iceberg – larger than New York City – breaks off Antarctica

A massive iceberg broke off Antarctica's Brunt Ice Shelf, British researchers announced. 

At 490 square miles, the berg is bigger than New York City, which is 302 square miles.

A crack in the ice shelf widened several hundred meters Friday before the iceberg sheared off. The last major chunk to come off in this area was in the early 1970s, the BBC said. 

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