Plate Nº 20 · recorded November 10, 2026
Biology & EvolutionReported finding
Taung Child Dated to 3 Million Years Ago Still Reshapes Human Origins
A century after discovery, the Taung child skull is dated to 2.96–3.03 million years, revealing climate-driven diversity among South Africa's early hominins.
By Priya Raman3 min read683 words
In brief
- The Taung child is dated to between 2.96 and 3.03 million years ago.
- The skull was found in 1924 at the Buxton Limeworks, South Africa, and described by Raymond Dart in 1925.
- It remains the only undisputed specimen of Australopithecus africanus.
- Pollen suggests a wetter, more wooded landscape, including Podocarpus trees now found hundreds of kilometers east.
- The study, led by Professor Gabriele Macho, appears in npj Palaeoecosystems.
One hundred years after its discovery, the Taung child skull has been dated to roughly 3 million years ago — and the new analysis suggests South Africa's early hominins were far more varied, and more tangled genetically, than paleoanthropologists long assumed.
A study led by Professor Gabriele Macho of the Vrije Universiteit Brussel and University College London places the famed fossil between 2.96 and 3.03 million years old. It concludes that shifting climates and interbreeding likely drove diversity among the region's early human relatives.
The skull remains, a century on, the only specimen that scientists can call, without dispute, Australopithecus africanus (an extinct, apelike but upright-walking human relative).
How was the fossil found?
Miners extracted the small skull in 1924 from the Buxton Limeworks, a limestone quarry in South Africa. The Australian anatomist and anthropologist Raymond Dart described it a year later, making the child the reference specimen — the standard-bearer — for its species.
The skull's exact position in the quarry was lost during mining, which left its age in doubt for decades. Earlier estimates ranged wildly, from about 942,000 to 3.03 million years.
How did researchers fix the age?
Professor Macho and colleagues used uranium-lead dating (a method measuring the decay of uranium into lead in minerals) on a flowstone — a sheet of mineral rock — lying above the fossil-bearing deposit. That yielded a minimum age of 2.962 million years.
Combined with earlier magnetic evidence for a maximum age, the team constrained the child to the window between 2.96 and 3.03 million years ago.
What do the teeth and brain reveal?
The researchers compared the child's teeth and brain development with those of other fossils. Three findings stand out:
- Tooth-formation patterns suggest the child's development may have slowed after its first molars emerged, as in modern humans — a possible hint of the beginnings of a 'childhood' stage.
- Models of brain growth suggest the child could have grown up to resemble some adult fossils attributed to the species, but not others.
- The junction between tooth enamel and dentine falls at the edge of the Australopithecus africanus range, roughly equidistant from a fossil of that species and one of its robust relative, Paranthropus robustus.
According to the study, this leaves 'little doubt' about species diversity at Sterkfontein, a nearby fossil site.
What drove the diversity?
To explain the variation, the researchers turn to climate. Ocean-sediment records suggest southeastern Africa was more climatically variable between 4 and 2.5 million years ago than in the following million years or so.
Pollen from two samples found near the Taung flowstone — though their exact provenance is unknown — indicates a wetter, more wooded landscape than today's semi-arid savanna. The pollen includes Podocarpus, a tree now found hundreds of kilometers to the east.
The scientists propose that hominin populations tracked these shifting habitats across a biogeographic boundary (a zone separating distinct plant and animal communities) near the Limpopo River. Such movements, they argue, could have encouraged genetic drift (random changes in small populations) and hybridization between groups.
A tangled bush, not a straight trunk
"For over 100 years, we assumed the Taung child was just one of many similar fossils from the era," Professor Macho said. "Our findings turn that on its head. The human family tree wasn't a neat, straight trunk — it was a chaotic, tangled bush driven by climate shifts."
The findings carry caveats. The new age rests on dating rock above the deposit rather than the fossil itself, and the pollen samples cannot be tied precisely to the flowstone. The developmental comparisons also rest on a single juvenile skull.
Still, the researchers see the century-old fossil as far from finished. "A century after its discovery, the Taung child continues to reshape our understanding of how diverse 3-million-year-old hominin populations eventually gave rise to our own genus, Homo," they said.
The study appears in the journal npj Palaeoecosystems (G.A. Macho et al. 2026).
A century later, the quarry child still refuses to sit still.
via sci.news (Source)
More from Priya Raman
Show full bio
Senior reporter covering people, launches and day-to-day practice in general science news at SciBeat.
342 articles
Nearby plates
- Taung Child age and fossils reshape the human family tree
- Adult Fossil Confirms Homo erectus Roamed Southern Africa 2 Million Years Ago
- No Male Markers in 20 Homo naledi Fossils: Was This Cave Women-Only?
- Scientists digitally reconstruct face of 315,000-year-old Homo sapiens
- 17-Million-Year-Old Ape Jaw From Egypt Rethinks Ape Origins