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Published online 5 July 2007 | Nature | doi:10.1038/news070702-12

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The tusk detective

Samuel Wasser is a conservation biologist at the University of Washington in Seattle, and an outspoken opponent of elephant poaching. He talks to Emma Marris about his genetic methods for tracing poached ivory.

Q. Tell me about some of the ivory seizures you've worked on.

A. There was a seizure in 2002 in Singapore of 6,500 kilograms of ivory — 531 tusks, many of which were huge.

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