Why past mass extinctions didn't break ecosystems—But this one might

ScienceDaily
Jun 9, 2025, 2:06 am387 pts
For millions of years, large herbivores like mastodons and giant deer shaped the Earth's ecosystems, which astonishingly stayed stable despite extinctions and upheavals. A new study reveals that only twice in 60 million years did environmental shifts dramatically reorganize these systems once with a continental…

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