Cats are excellent observers, and their heightened senses make them seem like super-heroes. Their keen senses of hearing, sight, smell, and touch make them excellent hunters. Even at night and in dim light, they can detect changes in air pressure and smell, using these to their advantage.
Fortunately, this fantastic ability does not come at the expense of their human owners' well-being.
A cat's vomeronasal organ, located on the roof of the mouth, can detect chemical signatures, or pheromones, that allow them to know what they're looking at. That's how cats with open mouths can pick up on the scents of food and other objects, often several meters away.
So, a cat's keen sense of smell can help them detect hidden food and identify potential predators.