Russia in the collective work was represented by Maria Gritsevich. (image) Ural Federal University Share Print E-Mail Caption Maria Gritsevich recalled that the impact of an asteroid into the Gulf of Mexico 65 million years ago led to the extinction of a large number of animal species, including dinosaurs. Credit UrFU / Grigory Tkachenko Usage Restrictions Image may only be used with appropriate credit: UrFU / Grigory Tkachenko. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.