Daily Mail
"Professor Johnson said the research centred on a swamp called Lynch’s Crater in northeast Queensland, where the sediment record reaches back to 130,000 years ago. He said: ‘It showed that the abundance of large mammals was stable until just before 40,000 years ago, when it suddenly crashed. ‘This rules out climate change as a cause of extinction, as there were several periods of climate drying before the extinction and they had no effect on abundance and when the animals did go extinct, the climate was stable. ‘But the extinctions followed very soon after the time that people arrived in the region - so it seems that people did it.'
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