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Olduvai
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Olduvai III: Catacylsm
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Guest post: The irreversible emissions of a permafrost ‘tipping point’

Guest post: The irreversible emissions of a permafrost ‘tipping point’ Across vast swaths of the northern hemisphere’s higher reaches, frozen ground holds billions of tonnes of carbon.  As global temperatures rise, this “permafrost” land is at increasing risk of thawing out, potentially releasing its long-held carbon into the atmosphere. Abrupt permafrost thaw is one of […]

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Olduvai IV: Courage
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Olduvai II: Exodus
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