National Geographic News, Reporting Your World Daily

Thursday, October 28, 2010

Photo: Dogs Smell Cancer in Patients' Breath, Study Shows


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Cancer researchers in California say ordinary household dogs can accurately distinguish breath samples of lung- and breast-cancer patients from those of healthy subjects. Basic "puppy training" requires only a few weeks. The hound dog pictured above was not involved in the study.

Photograph by Karen Kasmauski