A colossal ocean current encircling Antarctica—stronger than all the world’s rivers combined—played a far more complex role in shaping Earth’s climate than scientists once thought. New research shows it didn’t form just because ocean gateways opened, but required shifting continents and po werful winds to align. This shift helped pull carbon dioxide out of the atmosphere, contributing to a major cooling event that transformed Earth into the ice-covered world we know today. ...read more read less