Carl Os

Science, agriculture, and Education
Welt
HUMUS sapiens - short guides
by Julian Chollet (mikroBIOMIK), Malte Larsen, and Akvilė Paukštytė

Publishing, art, and Literature
Lucerne, Zürich, and Berlin
Thesaurus rex
by René Gisler, Petra Z. Meyer, and arminmueller

Science, agriculture, and Education
Zürich and Munich
Humus sapiens
by Julian Chollet (mikroBIOMIK), Maya Minder, Hackteria.org, and dusjagr