444 million years ago during the end of the Ordovician period, 85% of marine life became extinct. For the past 20 or 30 years, one theory has explained this extinction: a single glacial period. Now, a team of researchers including André Desrochers of the University of Ottawa has debunked this theory in findings published in Nature Communications. By combining two of the period’s most important archives, from Morocco and Anticosti Island, the international team was able to determine that in fact multiple glaciations were the cause of marine life extinction. Read the complete article.