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Chapter 838 - 3: Selfish People
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Chapter 840 - 5: The Three-Body Problem
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... eatures existed on this planet before us, but none survived ultimately."
"Are you talking about mass extinctions?"
"Exactly, there have been five major mass extinction events in Earth's history: in the Ordovician, Devonian, Permian, Triassic, and Cretaceous periods.
"And mammals, including our ancestors, only emerged onto the historical stage in the Tertiary period."
Taylor said, "Our evolution to the current civilization relied not only on our intelligence and ef ...
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