A tangled mass of fish from the deposit in North Dakota's Hell Creek formation. Photo: Robert DePalma/University of Kansas

What happened on the day the dinosaurs died? Fossils shed light on global chaos

  • Roughly three in four species perished in what’s called the K-T extinction. The killer asteroid most famously claimed the dinosaurs
Topic |   Science

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A tangled mass of fish from the deposit in North Dakota's Hell Creek formation. Photo: Robert DePalma/University of Kansas
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