World’s Largest, Oldest Iceberg Runs Aground Near Antarctic Island
A23a weighs nearly a trillion metric tons, making it the world’s largest active iceberg. It calved from Antarctica in 1986, ...
World’s Largest Iceberg Runs Aground
A massive superberg, four times as big as New York City, has halted east of the southern tip of South America.
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World's largest iceberg runs aground in South Georgia and blocks off key penguin feeding ground
The so-called A23a iceberg, the world's largest, has run aground in South Georgia after almost 40 years at sea, threatening important penguin colonies.