* Astronomy

Iceberg bigger than Guam drifting from Antarctic glacier

Scientists are watching an iceberg bigger than the island of Guam as it slowly moves away from an Antarctic glacier.
NASA scientist Kelly Brunt said it is more a wonder than a worry and is not a threat to shipping or sea level rise.
Brunt said the iceberg, named B-31, is about 255 square miles, roughly six times as big as Manhattan and as much as 1,600 feet thick
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