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 waters.

Researchers have found a new way to use satellites to monitor the Great Whirl, a massive whirlpool the size of Colorado that forms each year off the coast of East Africa, they report in a new study.

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. An enormous ocean whirlpool the size of Colorado appears every spring off the coast of Somalia, ...