What's happened
Protein analysis of Homo naledi teeth from Rising Star Cave shows AMELX presence without AMELY, indicating all known remains are female. The finding suggests deliberate, female-led burial practices within Rising Star and raises questions about social structure among this extinct species.
What's behind the headline?
Analysis
- The study relies on dental enamel proteins to infer sex, a new approach for Homo naledi.
- If confirmed, the female-only remains could imply structured social roles and burial rituals among Naledi.
- The interpretation challenges assumptions about brain size and social complexity in early hominins.
- The finding prompts re-examination of other Rising Star remains for potential sex-biased patterns.
Forecast: Further sampling and replication will be needed. If replicated, expect a shift in theories of gender roles in early human evolution.
How we got here
Rising Star Cave in South Africa yielded over 20 Homo naledi specimens between 2013 and today. Prior debates centered on whether the deaths were due to accident or deliberate grouping. New proteomics suggests a consistent female lineage in the cave assemblage, reshaping views of early social behavior.
Our analysis
Ars Technica reports that all analyzed Homo naledi teeth from Rising Star Cave carry AMELX with no AMELY detected, implying a female-dominant assemblage and suggesting deliberate burial. The Independent covers the broader implications for social organization and gender identity in Homo naledi, highlighting the extraordinary preservation by the Underground Astronauts and Lee Berger’s team.
Go deeper
- Could other Homo naledi sites reveal similar female-dominated patterns?
- What does this mean for our understanding of gender roles in ancient hominins?
- Will additional proteomic or ancient DNA work confirm these findings?
More on these topics
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Rising Star Cave - The Rising Star cave system (also known as Westminster or Empire cave) is located in the Malmani dolomites, in Bloubank River valley.
The Rising Star cave system is located in the Malmani dolomites, in Bloubank River valley, about 800 meters southwest of Swartkrans, part of the Cradle of Humankind World Heritage Site in South Africa.
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South Africa - Country in Southern Africa
South Africa, officially the Republic of South Africa, is the southernmost country in Africa. With over 59 million people, it is the world's 24th-most populous nation and covers an area of 1,221,037 square kilometres.
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Homo naledi - Primate
Homo naledi is a species of archaic human discovered in the Rising Star Cave, Cradle of Humankind, South Africa dating to the Middle Pleistocene 335,000–236,000 years ago.