Deep Boreholes: Exploring the Underground

This lecture delves into the exploration of deep boreholes, showcasing the history and significance of underground studies. From the visionary contributions of Hans-Peter Tschudi to the development of social security and environmental protection, to the challenges faced in crossing Neuchâtel through various proposed variants, the lecture covers the depths of the Earth's crust and lithospheric mantle. It also explores the construction of the 1960's freeway system plan in Switzerland and the technological advancements in geothermal drilling. The lecture highlights the importance of going deep for scientific research, with a focus on geology, earth sciences, and the utilization of underground space for various purposes.