Dr. G.H.J. (Geeske) Langejans
- Finding resolution for the Middle to Later Stone transition
- NWO Veni: What’s in a Plant: Tracking Early Human Behaviour tracking through Plant Processing
- Unprocessed Paleolithic stone
- Preservation of organic residue on tools
- Shells / shellfish in the Paleolithic
- Climate change and human adaptation
- Why is birch tar a better glue than pine resin in an Ice Age?
- What does ocher do in a prehistoric composite glue?
- Can you identify tar with SEM-EDS?
As a researcher-lecturer in archeological materials I am affiliated with the Materials Science & Engineering department (Faculty of 3mE). I work primarily with stone, shell and glues from the European and African Palaeolithic (250.000 – 15.000 years old). I characterise materials using a range of methods, and through experimental archaeology I validate how prehistoric objects were produced, used and preserved. I have done a lot of research into early hunter-gatherers and the interaction between climate and behavioural changes in southern Africa.
I am fascinated by prehistoric adhesives, they are a wonderful example of very early "garden-variety chemistry" where the end product cannot be predicted from the initial ingredients. The core of my current project (ERC Ancient Adhesives) also touches on another major interest: the development of technology. My team and I characterise glue ingredients and we examine the material choices. We are also developing a computer method to measure the complexity of adhesive technology. To compare the technological capabilities and unique solutions of Neandertalers with those of modern people.
Other projects and interests:
Take a look behind the scenes of the Ancient Adhesives Project