1. Institute of Geological Sciences University of Bern Baltzerstrasse 1+3 3012 Bern Switzerland
2. Natural History Museum Bern Bernastrasse 15 3005 Bern Switzerland
3. Albert Einstein Center for Fundamental Physics University of Bern Sidlerstrasse 5 3012 Bern Switzerland
4. Institute of Physics University of Freiburg Hermann‐Herder‐Strasse 3 79104 Freiburg Germany