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By Grace Glueck
The New York Times
April 2, 2004
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Newman working on his synagogue project as Richard Meier looks on, 1963. Photo by Jonathan Holstein
The discontinuity in artistic styles between the earlier Bradshaws and the current Wandjina has been attributed to the severe drought phase that followed the collapse of the wet season in 5,500 BP. The Bradshaw style art ended around this time, possibly within 500 years. The emergence of Wandjina art depicting cloud and rain spirits 3,800 to 4,000 years ago coincides with the end of the "mega-drought" and a return of the rain which gave the region its current climate. The research papers lead author, Hamish McGowan , suggests further investigation into the resulting cultural collapse and the possibility that another ethnic group supplanted the Bradshaw artists.  The chair in Kimberley rock art at the University of Western Australia , Peter Veth, has critiqued the research paper for claiming that simultaneous changes in climate patterns and art styles indicates the collapse of a culture. Veth suggests that a climate change coinciding with the change from Bradshaw to Wandjina art is coincidence, pointing out that the archaeology of the Kimberley does not show a break in occupation, and that stylistic changes in Aboriginal art have occurred elsewhere in Australia. Additionally, the migration of a new ethnic group into the area is unsupported by the linguistics . 
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