Crushed limestone can add nutrients and reduce ... In fact, flat boulders make good steps. These large landscape rocks are sometimes used to build retaining walls or tiered yards because their ...

CONNOR: Good thinking! I read a bit about limestone on the bus journey. Limestone is a sedimentary rock created by layers of skeletons and shells of sea creatures found in ancient, warm ...

When it rains in the park, the males of a tiny amphibious species emerge from the rocky caves, searching for an elevated log or ledge. They make their way to the top, then let out a call. The sound ...