Cradle of Humankind: Fossils, Caves and Human Origins

The Cradle of Humankind is a UNESCO World Heritage Site about 50 km north-west of Johannesburg, where limestone caves have preserved fossils of human relatives spanning millions of years. Sites such as Sterkfontein, Swartkrans, Kromdraai and Rising Star have produced some of the most important finds in the study of human evolution, from Mrs Ples and Little Foot to the surprising species Homo naledi.

Despite its name, the Cradle of Humankind is not the single birthplace of humanity. No one place is. The evidence from South Africa, East Africa and North Africa together shows that our evolution was a long, branching, continent-wide African story. This article explains what has been found here, what it means, and how the southern Cape coast adds a different, equally fascinating chapter.

Why the Cradle of Humankind preserves so many fossils

The landscape sits on ancient dolomite, a rock that slowly dissolves in groundwater to form caves and shafts. Over hundreds of thousands of years, bones fell, washed or were carried into these openings, where they were sealed in hard cave sediments called breccia. Lime miners in the late nineteenth and early twentieth centuries blasted into many of these deposits, which is how scientists first learned how rich they were.

UNESCO inscribed Sterkfontein, Swartkrans, Kromdraai and their surroundings in 1999. In 2005 the listing was extended to include the Taung skull site and the Makapan Valley further afield, and the whole is now known as the Fossil Hominid Sites of South Africa. You can find the listing on the UNESCO World Heritage Centre website.

Taung, Mrs Ples and Little Foot

The South African story begins outside the Cradle itself. In 1924 a small fossil skull from a lime quarry at Taung, in today's North West province, reached the anatomist Raymond Dart. He named it Australopithecus africanus and argued it belonged to an upright-walking human relative. Many scientists at the time dismissed the claim, partly because they expected human origins to be found in Europe or Asia. Later discoveries proved Dart broadly right.

In 1947 Robert Broom and John Robinson found a remarkably complete adult skull at Sterkfontein, nicknamed Mrs Ples after its original genus name, Plesianthropus. It is now classed as Australopithecus africanus and is more than two million years old.

Little Foot is one of the most complete early hominin skeletons ever found. Ron Clarke recognised some of its foot bones in stored material in the 1990s, and in 1997 his colleagues Stephen Motsumi and Nkwane Molefe located the rest of the skeleton in the cave rock. Freeing it took around two decades of painstaking work. Its age has been argued over, with some studies placing it well over three million years old.

Rising Star and Homo naledi

In 2013 recreational cavers exploring the Rising Star cave system squeezed through a very narrow chute and found a chamber scattered with bones. A team led by Lee Berger recovered well over a thousand fossil pieces from several individuals, and in 2015 they described a new species, Homo naledi ("naledi" means "star" in Sesotho and Setswana).

Homo naledi had a small brain, similar in size to an australopith's, yet hands, feet and teeth with surprisingly human-like features. When the remains were dated to somewhere around 236,000 to 335,000 years ago, it became clear that this small-brained species lived at roughly the same time as early Homo sapiens elsewhere in Africa. Claims that Homo naledi deliberately buried its dead or made engravings are actively debated, and many researchers are not yet convinced.

Elsewhere in the Cradle, Swartkrans has produced fossils of Paranthropus robustus, a heavy-jawed relative that was not our ancestor, and Malapa yielded Australopithecus sediba, described in 2010. Maropeng, the official visitor centre, has a Setswana name usually translated as "returning to the place of origin". Access to individual caves, including Sterkfontein, can change because of flooding, research or maintenance, so visitors should check before travelling.

Blombos Cave and Pinnacle Point: the southern coast

A very different story comes from South Africa's southern coastline, where caves preserve evidence of what early Homo sapiens did rather than what earlier relatives looked like. At Pinnacle Point near Mossel Bay, researchers found evidence that people were collecting shellfish and using red ochre roughly 160,000 years ago, possibly finding refuge on a food-rich coast during a harsh climatic period.

At Blombos Cave, near Still Bay, archaeologists uncovered pieces of ochre deliberately engraved with cross-hatched patterns, shell beads and, in a find reported in 2018, a small stone flake bearing lines drawn with ochre, dated to around 73,000 years ago. These finds are central to debates about when people began to think symbolically, sharing meaning through marks and ornaments.

No birthplace and no "missing link"

It is tempting to ask where humanity began, but the evidence does not point to one spot. Some of the oldest known Homo sapiens fossils come from Jebel Irhoud in Morocco, around 300,000 years ago, while others come from Ethiopia and South Africa. Many researchers now think modern humans emerged from populations spread across Africa that met, separated and mixed over long periods.

That is also why scientists avoid the phrase "missing link". Evolution is not a ladder from simple to advanced with one gap waiting to be filled. It is a branching bush in which several hominin species often lived at the same time, most branches ended, and our own lineage is one twig among many. The Cradle's fossils, alongside finds like the Laetoli footprints in Tanzania and Turkana Boy in Kenya, are pieces of that wider picture. Nor does any of this make any living people "closer" to the past: everyone alive today is equally modern.

Human origins on foot

Leon's walk from Cape Agulhas to Windsor, planned to begin in December 2026, follows the shared human story north through Africa. In South Africa, the direct walking line does not pass through Gauteng, so the current plan is a research trip from the line: Leon would record his exact position, travel to the Cradle, and return to the same point before walking on. He hopes to learn from African palaeoscientists and heritage workers, not only from famous names. The planned line north of Kimberley also passes through the region around Taung.

Later in the walk, the same story continues through the Kabwe skull in Zambia and the great East African sites. See the full route, follow the journal once walking starts, and if you would like to help, please sponsor the walk.

Frequently asked questions

Why is it called the Cradle of Humankind?

The name reflects the exceptional number of hominin fossils found in its caves. It is a heritage name, not a scientific claim that humanity began in this one place.

What is the most famous fossil from the Cradle of Humankind?

Mrs Ples, found at Sterkfontein in 1947, is the best known, alongside the near-complete Little Foot skeleton and the Homo naledi fossils from Rising Star.

How old are the fossils?

They range widely, from around three million years old or more for the oldest australopith finds to a few hundred thousand years for Homo naledi.

Can you visit the Cradle of Humankind?

Yes. Maropeng is the main visitor centre, and some caves offer guided tours, though access can change, so check before you go.