While a dog’s brain is only one-tenth the size of a human brain, the part that controls smell is 40 times larger than in humans. A dog’s sense of smell is about 1,000 to 10,000,000 times more sensitive than a human’s, depending on the breed animal biology brain dog human sense of smell smell EditorAll author postsRelated Posts April 10, 2014Pepsi to develop 'Scent Capsule'by Editor February 28, 2013Hospital sniffer dogs smell out sick patientsby Editor June 9, 2007Lindstrom, the 'All Sense' Brand Guruby Editor PrevNext