28. August 202126. August 2021 conservation, education, media-echo Mass extinctions & amphibian crisis: Interview with Prof. Dr. Thomas Ziegler Published on the YouTube channel Science Lab Cologne the 04.08.2021. | By: Veronika Huppertz In the interview, Prof. Dr. Thomas Ziegler speaks about how zoological institutions like Cologne Zoo can help to solve problems in conservation. » to the full video