Top mapmakers are busily updating their charts after a massive iceberg sheared off Antarctica, fundamentally changing the landscape of the peninsula — likely forever.

An iceberg of that size could hang around for a year or more, Robert Marsh, a scientist at the University of Southampton in England, said last year. The largest iceberg ever recorded was called B15.

Andrew Evans encounters his first iceberg on his way to Antarctica (while wearing a penguin shirt, naturally). Just like the very first Antarctic explorers (Ross, Wilkes, and Captain Cook), my ...

Jill Heinerth is one of the most accomplished cave divers in the world. But she and her crew were in danger when they explored Antarctica's B-15 iceberg.

An iceberg of that size could hang around for a year or more, Robert Marsh, a scientist at the University of Southampton in England, said last year. The largest iceberg ever recorded was called B15.