But how many know that Pavlov's research didn't end with his observation of canines? That he next began duplicating his experiments on human subjects? That those human experiments saw Pavlov and his protégé, Nikoli Krasnogorsky, scooping orphans off the streets, drugging them, surgically fitting them with salivation monitors and force-feeding them food so that these children, like Pavlov's dogs, could be trained to salivate on command?