Canines have senses of smell that are on average 40x's stronger than ours - that's just mind boggling! These 100 - 300 million receptors (vs. only 5m for us humans) are so sensitive they can even detect emotions (this takes the old adage 'I can smell your fear' a whole new level) and they can even breath through one nostril at a time.

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"The fact that they also worked and worked and worked without finding a live subject, some of the handlers would actually take one of their team members and have them do a little hide and seek so the dog could have a find and have a happy reward." - Penny Sullivan

"If it wasn't for the dogs, [I would] probably still be under the rubble" - Genelle 

"They will literally put their lives on the line for us" - Nancy Brooks