Study Finds Mercury Contamination Occurred Prior to Dinosaur Extinction Volcanoes are the largest natural source of mercury in the atmosphere.

Chronology of geological events prior to the great extinction 66 million years ago. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2014 / 02 / 140214075407.htm ...

More mammals were living on the ground several million years before the mass extinction event that wiped out the dinosaurs, new research led by the University of Bristol has revealed. The study, ...