Heatwave causes massive melt of Greenland ice sheet

Greenland's ice sheet has experienced a "massive melting event" during a heatwave that has seen temperatures more than 10 degrees above seasonal norms, according to Danish researchers.

Iceberg breaks in Antarctica not where expected

(AP) -- With the dramatic crash of an iceberg against a glacier that dislodged a massive new chunk of ice, the mysterious continent of Antarctica once again did the unexpected.

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