miércoles, 25 de abril de 2012

Rise of Humans Two Million Years Ago Doomed Large Carnivores

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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