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Olduvai
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Olduvai III: Catacylsm
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Civilization as asteroid: humans, livestock, and extinctions

Mass of humans, livestock, and wild animals (terrestrial mammals and birds) Civilization as asteroid: humans, livestock, and extinctions Humans and our livestock now make up 97 percent of all animals on land.  Wild animals (mammals and birds) have been reduced to a mere remnant: just 3 percent.  This is based on mass.  Humans and our […]

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Olduvai IV: Courage
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Olduvai II: Exodus
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