A colossal iceberg four and a half times the size of Manhattan has broken off the Pine Island Glacier in West Antarctica, marking the second time the glacier has calved a giant iceberg in just two years, according to news reports. On Saturday (Sept. 23), Stef Lhermitte, a satellite observation specialist at Delft University of Technology in the Netherlands, saw a satellite image showing that the glacier had lost an enormous chunk of ice.

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