extinction
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Dinosaurs were unlucky: Asteroid hit Earth at 'bad time'
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Why orcas remain in danger of extinction
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Passenger pigeon resurrection is focus of scientific genetic engineering effort
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Species going extinct a thousand times faster because of humans, but not all gloom and doom
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Collecting plant and animal specimens does not lead to extinction of species, say researchers
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Learn from cougar if you want to survive mass extinction: Don't be a fussy eater
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Tiny microbes nearly wiped out life on Earth: It's the end of the world as we know it
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Methane-producing microbes responsible for mass extinction 252 million years ago
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Rare panther body found in Florida state preserve
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Why woolly mammoths became extinct? Cervical ribs may hold the answer
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Ancient bighorn sheep tell their tale in prehistoric dung
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You dirty, BIG rat: Can super-massive rodents take over the Earth one day? Possible
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