mass extinction

excavation site

 Anoxia no longer suspected to be a main cause According to many scientists, our species is currently entering the sixth mass extinction — the one that we alone have caused. University of Ottawa professor André Desrochers re-examined the cause of the first major mass extinction (late ordovician mass extinction) to hopefully gain insight into our …

Researchers from the University of Ottawa and University of Strasbourg in France have rewritten the story on the second-largest mass extinction in Earth’s history, an event that wiped out about 85 per cent of life on Earth at the time.