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Early warning sign of extinction?
"Using a high-resolution global dataset of planktonic foraminifera fossils that’s among the richest biological archives available to science, researchers have found that environmental events leading to mass extinctions are reliably preceded by subtle changes in how a biological community is composed, acting as an early warning signal."
https://news.harvard.edu/gazette/story/2024/04/early-warning-sign-of-extinction/
