Human Ancestors Evolved in a Low-Carbon World

EcoWatch
By Climate News NetworkOct 4, 2019, 12:35 pm178 pts
By Tim Radford For the entire 2.5 million years of the Ice Age epoch called the Pleistocene, it was a low-carbon world. Atmospheric carbon dioxide hovered around 230 parts per million. Not only did Homo sapiens evolve on a low-carbon planet, so did Homo erectus and most other human species now known only from…

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