 Hello, my name is Guillaume Duclos, I'm an associate professor in geology at the University of Nice in south of France, and I study tectonics. To study the tectonic evolution of rocks, I'm actually using mainly two methods. Field geology, where I'm doing some mapping, structural mapping of deformed rocks. I'm using my compass, using maps, and making maps actually. And when I'm back in the lab, I'm mostly using numerical modeling and very large supercomputers to try to model the thermal and mechanical evolution of continental crust, to try to understand the processes that are controlling the deformation patterns in the continental crust.