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@NorthwesternU
news.northwestern.edu > stories > 2026 > 07 > tiny-fossils-crack-a-cretaceous-cold-case

Tiny fossils crack a Cretaceous cold case

3+ hour, 27+ min ago   (617+ words) A 113-million-year-old marine murder mystery may finally be solved. Using chemical clues locked inside microscopic fossils, Northwestern University scientists found evidence that ocean acidification drove one of the largest extinction events in the history of planktic foraminifera — tiny shell-building organisms…...