The ensuing isthmus proved transformative, forcing warm, equatorial current from the Gulf of Mexico into the Atlantic and up the North American coast as the Gulf Stream.

Madison is an isthmus. The city is so narrow you can walk from Lake Mendota to Lake Monona in about 15 minutes. Seattle, which connects Lake Washington and Puget Sound, is another large isthmus in ...

On March 31, 2025, Mexico’s president, Claudia Sheinbaum gave the project a shout-out at a news conference. However, official ...