Cycles of Extinction for Earth’s Large Mammals –“New Research Nixes Human Cause in Africa”



In contradiction to common sense and the observation that humanity’s gain has been biodiversity’s loss, new research disputes the long-held view that our earliest tool-bearing ancestors contributed to the demise of large mammals in Africa over the last several million years. Instead, the researchers argue that long-term shifts in climate drove these near-time extinctions, mainly in the form of grassland expansion likely caused by falling atmospheric carbon dioxide (CO2) levels.