Tower Rock, a limestone formation in the middle of the Mississippi River, is newly accessible by foot. The destination is now popular with tourists, the Missouri Department of Conservation said. The ...

Looks like limestone’s on the menu for some unknown microbe.

Two limestone rock walls narrow to a tiny crevice near the Red Waterfront Trail at Lake Mineral Wells State Park and Trailway. Lichens and moss cover the rock face, and a few thorny bushes grow by the ...

A new species of lizard that finds itself at home—and very much camouflaged—on limestone rocks and jagged pinnacles has been discovered in central Laos. Granted, spotting it in the photo is relatively ...