On April 11th 2003 Hans-Joachim Zillmer gave the scientific introduction speech and
opened the
dinosaur exhibition in Cologne as scientific advisors as well as the
mayor in Cologne (Germany).
The mayor of Cologne, Josef Mueller, the direktor of the Cologne zoo, Prof. Dr. Gunther Nogge, and Hans-Joachim Zillmer jointly cut the red tape for the exhibition opening.
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