Zeitschrift fur Kristallographie. Supplement Volume 41 presents the complete Abstracts of all contributions to the 29th Annual Conference of the German Crystallographic Society in Hamburg (Germany) 2021: - Plenary Talks - Microsymposia - Poster Session Supplement Series of Zeitschrift fur Kristallographie publishes Abstracts of international conferences on the interdisciplinary field of crystallography.

The now forgotten East German particle physicist Hubertus M. Frassek believed in the existence of incredibly small black holes. He dreamt of travelling through Southern Germany in a mobile laboratory in order to prove his theories. Why Southern Germany? No one knows anymore. Decades later, Jan Köchermann (*1967) brought this dream to life again. At the invitation of the Kunstverein Göppingen, he undertook the hitherto unfulfilled, odd expedition with Frassek’s Space Collector. The publication itself is part of the “rolling dream along the frontiers of science� as documentation and artist’s book. Text in English and German.