2026-07-17 21:00:40
Three large portions of the Filchner Ice Shelf
—dubbed A22, A23, and A24
—calved into the Weddell Sea off of Antarctica in 1986.
For National Geographic, Chris Heath documents the life and death of an iceberg called A23a,
known at one time as the largest iceberg in the world.
Born when it broke off A23 in 1991,
it was “at least 44 nautical miles long, 40 nautical miles wide, and somewhere close to 2,000 square miles in area, or roughly the size of Bali.”

