How "Powerful" is a Dog's Sense of Smell! | Cancer Sniff Studies! MUST WATCH!!!

A dog's sense of smell is estimated to be 10,000 to 100,000 times more sensitive and accurate than a human's! It's incredible! Their scent has been used for decades to do police search and rescue work and not even smelling humans who have cancer! Watch the video to the end to learn about some incredible statistics of how dogs strong smell is being used today in human medicine trials!
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