Perception and the Human Sense

The human nose can distinguish trillions of sense seem to me absolutely amazing. I've had COVID recently and I can distinguish about two and a half, but I'm going to try and get back as close to trillions as I can as soon as possible. Back to perception. You mentioned there, for example, even my pin doesn't do a justice perception. And you tell us about some of the fascinating things were available to us to perceive.