"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.

A23a broke off from Antarctica in 1986 and almost immediately got stuck after a deep section of it grounded on the seafloor. Recently, it became dislodged and started drifting again.

A23a broke off from Antarctica’s Filchner Ice Shelf in 1986, and remained grounded on the seabed in the Weddell Sea for over 30 years before beginning its slow journey north in 2020.

A23a, the world's largest and oldest iceberg, is finally cruising again through icy ocean waters after an unexpected delay. This summer, A23a got stuck near the South Orkney Islands, twirling in ...

A23a's great bulk could disrupt the animals' normal foraging routes, preventing them from feeding their young properly. But it would be wrong to think of icebergs as being just objects of danger ...

A23a started to drift up through the Southern Ocean in 2020, when currents put it on a possible collision course with South Georgia. The iceberg and the island are about the same size in square miles.

A23a, nicknamed the "queen of icebergs," measures 1,222 miles (1,967 kilometers) in surface area, according to the U.S. National Ice Center. It first broke off from Antarctica's Filchner Ice Shelf ...

A23a, as it's known, broke away from the Antarctic coastline way back in 1986, but it's only recently begun a big migration. For more than 30 years, it was stuck rigidly in the bottom-muds of the ...

However, A23a may not hold its size title for long, because as of May 16, it is only around 12 square miles (31 square km) larger than the next-biggest iceberg, D15A, according to the U.S ...

The iceberg, dubbed A23a, is caught in the churn of a powerful ocean current and revolving slowly, at a rate of around 15 degrees per day, according to the British Antarctic Survey, which shared ...

NASA image of A23a on November 28, 2023, (main) and stock map of Antarctica (inset). Currently the largest iceberg in the world, A23a is on the move again after being trapped in an ocean current ...

A23a megaberg: Game of Thrones style ice wall on course to hit British island. The world’s largest iceberg, stretching from horizon to horizon, is on course to hit South Georgia Island.