Great Catastrophes in Earth History

In human history we have witnessed impressive natural disasters. These mis-events pale in comparison with great events in earth history. Disasters may seem dire challenges to life on earth but ultimately, they proved to be great opportunities for new forms of life to evolve. We may not want to have shared our living space with dinosaurs.

Peter Dodson, Ph.D., Professor of Anatomy, Labs of Anatomy, Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine and Professor of Paleontology, Department of Earth and Environmental Science, School of Arts and Sciences University of Pennsylvania

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