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Long-term climate fluctuations were probably the main reason for the extinction of the dinosaurs and other creatures 65 million years ago, according to new research from a German paleontologist. The results challenge the almost 30-year-old theory that a meteorite impact at the Mexican Yucatan peninsula was the single cause for one of the five largest mass extinctions in Earth history.

Prolonged climatic stress main reason for mass extinction 65 million years ago, paleontologist says