Mexico City may be vanishing under the feet of 22 million people, sinking at a pace scientists can barely keep up with. For decades, the city drained the ancient lake it was built on, pulling water from deep underground to sustain its massive population.
In 2023, researchers confirmed that Taam Ja’, a blue hole in Chetumal Bay off Mexico’s Yucatán Peninsula, is the deepest known blue hole on Earth. Measurements have exceeded 1,372 feet without reaching the bottom. The hole is unusually difficult to spot from the surface, which helped it remain unnoticed for years.Blue holes are underwater sinkholes that formed when ancient caves collapsed and were…