Dramatic changes in rock art and geological evidence have led some researchers to believe that a 1,500-year drought in Australia led to the end of an ancient aboriginal tribe. The findings, published in the journal Geophysical Research Letters, suggest that changes in the style of art coincides with evidence of the drought. One expert, however, disagrees that the drought would have wiped out an entire culture, citing evidence that shows continuous occupation of the land throughout the time period.

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