Technician hugging two beagles, close up
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File name: dogs 8-CC.jpg
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Image dimensions: 3010x2492 pixels
Dogs in safety testing of pharmaceuticals, August 2000. Please acknowledge joint © Understanding Animal Research/Wellcome Images.
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Research involving dogs was crucial to the discovery of insulin to treat diabetes in the 1920s, and has also been important in the development of open-heart surgery and organ transplantation.
