Sterkfontein Caves

Sterkfontein Caves form a dolomitic limestone karst within South Africa’s UNESCO-listed Cradle of Humankind, where collapses and mineral-rich water cemented sediments into breccia that sealed bones from 3.5–0.5 million years ago. A century of excavation has produced some of the world’s most influential hominin fossils, including Australopithecus africanus, making the site central to how early human evolution is reconstructed and debated. Underground, calcite chambers and shadow make deep time feel physically present.