This mass extinction is commonly believed to have been caused by a meteorite impact on Yucatan, Mexico, leaving a crater known as Chicxulub. Decades of research by my small team of students and collaborators, including from the University of Lausanne, have yielded a wealth of critical information that questioned the impact theory as sole cause and precise age for this mass extinction. Our research discoveries revealed Deccan volcanism in India as the most likely primary cause with the killing mechanism being rapid climate warming from greenhouse gases, ocean acidification, acid rain, and toxic gas emissions distributed globally and generating repeated toxic environments, particularly due to volcanic mercury gas emissions. Evidence supporting the volcanism theory for mass extinctions has been found for all five major mass extinctions in Earth’s history and looms large as important analog for the currently ongoing sixth mass extinction where even more rapid climate warming is caused by fossil fuel burning and toxic emissions leaving life as vulnerable to humans as it was to dinosaurs 66 million years ago.
In Prof. Keller's words: Our global research spanning four decades could not have been achieved without the many graduate and undergraduate students, current and past collaborators and supporters. I gratefully share this academic honor with all of them.
Revivez le Dies academicus 2021
Gerta Keller receiving the award and statement (see Fr. 49:39)
Portrait de la docteure honoris causa