Tithonian
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What links here
Jack Sepkoski
David M. Raup
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James Kirchner
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Late Ordovician mass extinction
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History of biology
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Timeline of paleontology
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Presque Isle, Maine
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Nemesis (hypothetical star)
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Impact event
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Extinction
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Triassic–Jurassic extinction
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Stephen Jay Gould
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Extinction event
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