Penn’s Cave holds a title that no other attraction in the United States can claim. It is the only all-water cavern in America that welcomes the public for guided tours, and that distinction alone ...

In two recent papers, Saint Louis University researchers report finding high concentrations of microplastics present in a Missouri cave system that had been closed to human visitors for 30 years.

Researchers say pollution could spread rapidly through caves linked to Europe’s largest underground thermal lake.

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Thanks to new research from St. Louis University (SLU), we now now these microplastics have spread to areas long untouched by humans. Cliff Cave near Oakville has been closed off to public access ...