There have been anecdotal reports of dogs spotting cancer in their owners, but now researchers say they have proved this phenomenon scientifically.
Similar claims have been made about cancers of internal organs like the breast and lung.
Cancers are thought to produce distinctive odours. Even when present in minute quantities, it is possible that dogs, with their exceptional sense of smell, might be able to detect these odours.
Amazing - makes you wonder what other incredible things like this we may have overlooked.
