The largest iceberg in the world has run aground in the South Atlantic Ocean. The enormous wall of ice, known as A23a, was on a collision course with South Georgia Island. The island is mostly uninhabited by humans but is home to millions of seals and penguins.

A23a weighs nearly a trillion metric tons, making it the world’s largest active iceberg. It calved from Antarctica in 1986, making it the world’s oldest berg. And now, after drifting for half a decade, A23a has grounded itself about 56 miles (90 kilometers) south of South Georgia.

March 4 (UPI) -- The oldest and largest iceberg on Earth landed on a sub-Antarctic island belonging to Britain Tuesday.