Karst landscapes, covering nearly one-sixth of Earth’s land surface, are natural wonders sculpted over millennia by water. These awe-inspiring terrains, dotted with caves, sinkholes, and towering limestone formations, hold important ecological significance and a hidden record of Earth’s past climate. However, unraveling their precise age has long posed a challenge to scientists. A breakthrough study, published in Science Advances, presents a new method to date these landscapes, revealing profound insights into Western Australia’s ancient climate, including a puzzling period of extreme rainfall 100,000 years ago.