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F. Schöller:
"Three dimensional gravity";
Talk: 66th Yearly Meeting of the Austrian Physical Society (2016), Vienna, Austria (invited); 2015-09-28.

We live in a Universe with four observable space-time dimensions. Quantum mechanics describes to incredible precision the small scale of the Universe. Einstein's theory of gravity teaches us about the large scale structure of space-time. Combining these two theories and constructing a quantum theory of gravity is one of the great outstanding tasks of theoretical physics. While there are many open conceptual problems, there are also many technical ones. Some of which can be removed by reducing the number of space-time dimensions. I talk about aspects of the approach to quantum gravity in three dimensions.