Revised version of Prof. Dr. Martina Löw’s inaugural lecture, held on July 9th 2014.

Follow the link.

 

(fig: Milchstraße, Thüringen, Ansgar Koreng,  CC BY-SA 3.0 (DE),
https://upload.wikimedia.org/wikipedia/commons/9/9a/Milchstra%C3%9Fe%2C_Th%C3%BCringen%2C_151002%2C_ako.jpg)