A fascinating history of species extinctions, their causes and the looming "sixth extinction".
It is the central issue for this generation. Respected journals and popular publications worldwide pose the question, call the warning: "Are we in the middle of a sixth mass extinction?" (Science), "Multitude of species face climate threat" (The New York Times), "The sixth great extinction: a silent extermination" (National Geographic).
Of the 1-3 billion species estimated to have appeared during Earth's.
Norman MacLeod ebooks downloads
The Great Extinctions: What Causes Them and How They Shape Life for free
Norman MacLeod The Great Extinctions: What Causes Them and How They Shape Life free
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