News Dogs are great sniffers. A newfound nose-to-brain connection helps explain why Information highways connect smell and vision in a way that hadn’t been described before Get a whiff of this: Dogs’ olfactory systems are vaster than we knew, a new brain scanning study of pooches shows. Aberson/iStock/Getty Images Plus Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Laura Sanders July 19, 2022 at 9:00 am A dog’s brain is wired for smell. Now, a new map shows just how extensive that wiring is. Powerful nerve connections link the dog nose to wide swaths of the brain, researchers report July 11 in the Journal of Neuroscience.