The world’s biggest iceberg – more than twice the size of London - is on the move after decades of being grounded on the seafloor in Antarctica.

"It's a trillion tons of ice," as one expert told NPR. Now the largest iceberg in the world, A23a, is on the move after decades of being grounded on the seafloor.

Scientists capture stunning moment iceberg collapses into ocean 00:49. A massive slab of ice, roughly the shape of Manhattan but more than 70 times larger, has sheared off from Antarctica and ...

The world’s largest iceberg, which has moved for the first time in 30 years, could drift toward South Georgia Island and end up caught in a vital pass that animals use to access food during ...

The world's largest iceberg, A23a, is stuck again. For more than 30 years, the giant frozen block — equivalent to the size of Rhode Island — was grounded on the sea floor in Antarctic coastal ...

The largest iceberg ever recorded is Iceberg B-15, which calved from Antarctica's Ross Ice Shelf in March 2000. This iceberg measured approximately 4,250 square miles—nearly the size of Connecticut.

The A68A iceberg was the biggest iceberg on Earth when it broke off. Now gone, it has dumped nearly 1 trillion tons of water into the ocean.

World's largest iceberg on the move after dislodging from ocean floor 04:09. The world's biggest iceberg — three time the size of New York City — could drift toward a remote island where a ...