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Australia. Palynologist A. P. Kershaw has argued that Aboriginal burning may have modified the vegetation to the extent that the food resources of the megafauna were diminished, and as a consequence the largely herbivorous megafauna became extinct. Kershaw also suggested that the arrival of Aboriginal people may have occurred more than 100,000 years ago, and that their burning caused the sequences of vegetation changes which he detects through the late Pleistocene. The

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