There is strong, cumulative support for direct and indirect pressures from behaviorally modern humans,
'The large and very selective loss of megafauna over the last 50,000 years is unique over the past 66 million years,' according to the study's lead author Jens-Christian Svenning.
'Previous periods of climate change did not lead to large, selective extinctions,' Svenning noted in a statement, 'which argues against a major role for climate in the megafauna extinctions.'
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