Earth’s most powerful ocean current didn’t form the way we thought

The Antarctic Circumpolar Current carries more than 100 times the total flow of all the world's rivers combined. It circles Antarctica without being blocked by land, making it one of the most important drivers of the global climate system. New research published in the journal Proceedings of the National Academy of Sciences explores how and when this immense current first developed. The findings reveal that simply opening ocean gateways between Antarctica, South America, a...