A report on fossils from South Africa’s Drimolen Cave says researchers have now described 18 specimens that had been excavated over several decades but remained undescribed in the scientific literature. The most consequential specimen is a fragment of an adult Homo erectus skull placed at about 2 million years old—roughly 200,000 years earlier than the approximately 1.8-million-year-old adult Homo erectus fossils from Dmanisi commonly used for comparison.
What was found at Drimolen Cave?
Drimolen Cave lies in South Africa’s Cradle of Humankind, a fossil-rich region containing sites that document early human evolution. The report concerns 18 fossils from Drimolen that had not previously been formally described. Many were excavated during fieldwork conducted between 1992 and 2019, meaning the material could have been stored, catalogued or awaiting analysis for years rather than literally left exposed in the cave.
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The highlighted specimen is an adult Homo erectus cranial fragment. The available account identifies it only as a skull fragment; it does not provide a specimen number, detailed anatomical description, measurements or the exact fossil-bearing layer.
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How old is the Homo erectus skull fragment?
The fragment is reported as approximately 2 million years old. That is an age estimate at the scale of hundreds of thousands of years, not a measurement precise to a particular calendar year. The report does not state which dating technique produced the estimate, whether the date applies directly to the bone or to associated cave sediments, or the size of the dating uncertainty.
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Why the comparison is 200,000 years
Adult Homo erectus fossils from Dmanisi in Georgia are generally placed at about 1.8 million years old. Subtracting 1.8 million from approximately 2 million produces a difference of about 0.2 million years, or 200,000 years. Both figures are rounded, so “200,000 years older” should be read as an approximate comparison rather than a claim that the Drimolen fossil is known to be exactly 200,000 years older.
| Material | Reported age | What is established | Important qualification |
|---|---|---|---|
| Drimolen adult Homo erectus skull fragment | About 2 million years | An adult cranial fragment is attributed to Homo erectus in the report | Specimen identifier, layer, dating method and uncertainty are not stated in the available account |
| Adult Homo erectus fossils from Dmanisi | About 1.8 million years | Provides the contextual age used for the comparison | The figure is also rounded and is not a direct measurement of the Drimolen specimen |
Were the fossils really undescribed until 2019?
Not exactly. The wording means that 18 fossils excavated in campaigns extending through 2019 had remained undescribed in published research until the report discussed them. Excavation and description are separate stages: a specimen may be recovered, stabilised, inventoried and stored before researchers complete the anatomical study, establish its geological context and publish a formal description.
The accessible report does not establish that every fossil was physically sitting in the cave until 2019, nor that all 18 were excavated in the same year. It describes a backlog of material whose formal scientific descriptions had not yet appeared.
Why an adult specimen at this age matters
A roughly 2-million-year-old adult Homo erectus specimen from southern Africa would strengthen the early African record of the species. Adult material is especially useful because it can be compared with other adult skulls for features such as cranial shape, thickness and proportions; juvenile fossils can preserve a different combination of growth-related traits.
The find could also help researchers test how early Homo erectus was distributed across Africa and how its populations relate to fossils outside Africa. Drimolen’s geographic setting would add a southern African data point to a record that includes older or similar-aged material elsewhere on the continent and the early Dmanisi assemblage outside Africa.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the discovery does not yet prove
The available report is not detailed enough to determine whether the fragment changes the accepted date for the origin of Homo erectus, demonstrates a particular migration route or settles debates about which early fossils belong to the species. Those conclusions require the formal specimen description, measurements, stratigraphic information and a transparent account of dating.
- Age uncertainty: “About 2 million years” does not reveal the statistical range around the estimate.
- Dating context: It is not stated whether the age is direct dating of the fossil or dating of associated sediments and minerals.
- Geological position: The cave layer and its relationship to other Drimolen fossils are not identified in the accessible report.
- Anatomical evidence: No measurements or diagnostic features are supplied to show how confidently the fragment is assigned to Homo erectus.
- Completeness: A fragment cannot provide the same evidence as a substantially complete skull.
What to look for in the formal publication
A definitive assessment should identify the fossil by catalogue number, describe the preserved anatomy, state the excavation layer and explain how the layer was dated. It should also report uncertainty ranges and clarify whether the age derives from direct fossil analysis or associated deposits. Those details will determine whether the specimen is merely an early example of a known species or materially changes models of Homo erectus’s emergence and spread.
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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →For now, the secure takeaway is narrower: Drimolen researchers have reported 18 previously undescribed fossils, including an adult Homo erectus skull fragment estimated at about 2 million years old. Relative to the approximately 1.8-million-year-old adult Dmanisi fossils, that places the Drimolen specimen roughly 200,000 years earlier, pending publication of the full evidence.
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