Missouri is freckled with geologic features like caves and sinkholes. This is because the bedrock — composed of soluble rock like limestone and dolomite — is conducive to karst formation. Missouri has ...

Cave formation starts with a simple chemical reaction between water and carbon dioxide in the atmosphere, creating carbonic acid. This weak acid forms when rainwater combines with CO2, then ...

Cave explorers have traversed what's now the deepest known cave in Australia. On Saturday a group of explorers discovered a 401-meter-deep cave, which they named Delta Variant, in Tasmania's ...

An interstate might seem an arbitrary boundary. But an attentive West Texas traveler driving north of Interstate 10, on ...

This story is part nine in the AL.com series “Ancient Alabama,” examining the natural forces that made Alabama what it is over the past 500 million years, and how those forces still shape the state ...