The impact of Homo sapiens on the environment over the past few hundred years has been so profound that some scientists term this chapter of Earth s history the Anthropocene . But humans may have begun wreaking ecological havoc far, far earlier than that. A new suggests that a shift in the technology and diet of our ancestors around two million years ago led to the downfall of a number of large carnivore species in East Africa, which would have triggered cascades of ecosystem disruption.
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miércoles, 25 de abril de 2012
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