science

Sterkfontein

Sterkfontein is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sterkfontein rather than just read about it. In short: Sterkfontein (Afrikaans for Strong Spring) is a set of limestone caves of special interest in paleoanthropology located in Gauteng province, about 40 kilometres (25 mi) northwest of Johannesburg, South Africa, in the Muldersdrift area close to the town of Krugersdorp. The archaeological sites of Swartkrans and Kromdraai are in the same area.

Key takeaways

Sterkfontein belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sterkfontein to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sterkfontein from memory before moving on to harder problems.

Reference excerpt

Sterkfontein (Afrikaans for Strong Spring) is a set of limestone caves of special interest in paleoanthropology located in Gauteng province, about 40 kilometres (25 mi) northwest of Johannesburg, South Africa, in the Muldersdrift area close to the town of Krugersdorp. The archaeological sites of Swartkrans and Kromdraai are in the same area. Sterkfontein is a South African National Heritage Site and was also declared a World Heritage Site in 2000. The area in which it is situated is known as the Cradle of Humankind. The Sterkfontein Caves are also home to numerous wild African species including Belonogaster petiolata, a wasp species of which there is a large nesting presence. Numerous early hominin remains have been found at the site over the last few decades. These have been attributed to Australopithecus, early Homo and Paranthropus. In 2024 the cave was closed to visitors by its owner due to flooding. The caves reopened to the public on 15 April 2025.

History of investigations

Modern excavation of the caves began in the late 1890s by limestone miners who noticed the fossils and brought them to the attention of scientists. In 1936, students of Professor Raymond Dart and Dr. Robert Broom from the University of the Witwatersrand began concerted excavations. The caves yielded the first adult Australopithecine, substantially strengthening Dart's claim that the skull known as the Taung Child (an Australopithecus africanus) was a human ancestor. There was a pause in excavation during World War II, but after the war Dr. Robert Broom continued excavations. In 1947, he found a nearly complete skull of an adult female (STS 5) A. africanus (or possibly that of an adolescent male). Broom initially named the skull Plesianthropus transvaalensis (near-man from Transvaal), but it became better known by its nickname, Mrs. Ples. Mrs. Ples is now defined as a member of A. africanus. In 1984, Peter Verhulsel, who was a member of a cave diving expedition researching one of the caves, was lost and ultimately starved to death after three weeks in the cave as rescue groups could not find him. In 1997, a nearly complete skeleton of a second species of Australopithecus (StW 573) was found in the caves by Ronald J. Clarke; extraction of the remains from the surrounding breccia is ongoing. The skeleton was named Little Foot, since the first parts found (in 1995, in storage) were the bones of a foot. Excavations continue to this day, and finds now total some 500 hominids, making Sterkfontein one of the richest sites in the world for early hominids. The Palaeo-Anthropology Scientific Trust (PAST), a non-profit trust fund established in 1993, sponsors over 90% of the research undertaken at Sterkfontein and was instrumental in its nomination as a World Heritage Site.

Dating of the deposits The Member 4 deposits containing the Australopithecus africanus fossils have been dated to between 2.6 and 2.0 Ma, with the Sts5 "Mrs. Ples" fossil estimated to date to between 2.05 and 2.01 Ma based on a combination of Uranium–lead dating and palaeomagnetic analysis and electron spin resonance dating The StW 573 partial skeleton (Little Foot) was recovered from a separate infill at the site within the confines of the Silberberg Grotto. It is estimated to be around 2.6–2.2 Ma based on a combination of uranium-lead dating and palaeomagnetic analysis and belongs to a second species of australopith, Australopithecus prometheus. In contrast, surface exposure dating of sediments indicate that skeleton StW 573 has an age of approximately 4 million years. While the flowstone dated in the uranium-lead dating has been shown to have formed later than the fossil, an age estimate of ~3 Ma suggested by the same authors has little firm basis. The palaeomagnetic analysis remains the most credible age estimate based on the current data as it included work on both sediments and speleothem.

A slightly younger deposit (StW 53 infill) dated to between 1.8 to 1.5 Mya has revealed the remains of a specimen of early Homo (StW 53). StW 53 has been described as similar to Homo habilis or as a novel new species Homo gautengensis. No stone tools were associated with the fossil, but StW 53 has evidence for stone tool cut-marks. Member 5 contains Oldowan and Acheulian stone tools as well as specimens of early Homo and Paranthropus and is dated to between 1.6 and 1.1 Mya. In 2022 cosmogenic nuclide dating found that the bulk of Member 4 is 3.4 million years old." The team responsible for this work, which includes Clarke, says: "These results place nearly the entire Australopithecus assemblage at Sterkfontein in the mid-Pliocene, contemporaneous with Australopithecus afarensis in East Africa." They say this discredits the assumption that A. africanus descended from A. afarensis.

Gallery

Illustrations

Worked examples

Example 1 — a first encounter with Sterkfontein

Start with the simplest possible case. Write down what Sterkfontein claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sterkfontein before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sterkfontein ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sterkfontein

In research: Sterkfontein appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Sterkfontein in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Sterkfontein is common in secondary-school and first-year university syllabi. It links to neighbouring topics Archaeological sites in South Africa, Archaeological sites of Southern Africa, Caves of South Africa, so understanding it makes those chapters shorter.
In everyday life: Look for Sterkfontein outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Sterkfontein in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sterkfontein means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Sterkfontein out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sterkfontein in simple terms?

Why does Sterkfontein matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sterkfontein?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sterkfontein.