Speaker Series 2017: Discovery, Geological Context and Challenges of Dating a New Hominin, Homo naledi, from the Rising Star Cave, South Africa

The discovery of Homo naledi, a new species of hominin (the group encompassing modern humans, extinct human species, and all close human ancestors) was announced in September 2015. Found in a deep, nearly inaccessible cave system, this was the largest concentration of hominin bones ever found in Africa. The unusual distribution of bones suggested symbolic behaviour (e.g., deliberate placement by other H. naledi). The find attracted global media attention, including a feature in National Geographic. This discovery had such an impact that it was easily identified as one of the top 10 science discoveries of 2015 by numerous news outlets. The deposits, however, remain undated, leaving their evolutionary significance uncertain – were they a direct human ancestor or another branch on the family tree?

In the last talk of the 2017 Speaker Series, Dr. Eric Roberts, Associate Professor and Head of Geosciences, James Cook University, Queensland, Australia, presents an overview of the discovery of the site and discusses the efforts that went into unravelling the complex geological context of the cave system. He finishes with an overview of his team’s efforts and progress over the last two years at dating the fossils and refining our understanding of this important new hominin locality.

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