Most animals are given a minimum of five senses: the sense to see, hear, smell, fell and taste. Different animals possess different characteristics that are based on the heightening of a few of these senses. But, these characteristics have limitations, due to the brain's ability to process selected information.
We(humans) are part of the animal kingdom, but we lack the characteristics of most animals. We lack claws, sharp teeth, tough skin, strong since of smell, etc. The only thing that sets us apart from other animals is our brain. When it comes a time where we need those animal characteristics, our brain goes to work. Our brain figures out how to accomplish the same results without having specific animal characteristics.
Yet, one can tell that a diminished characteristic is a direct clue of a diminished sense. When one sense is decreased it is, usually, compensated by the increase of other senses. Many times, one does not thoroughly focus on one of their senses until they lose another.
As we have seen in history, when a civilization grows very big, there are too many sections for the government to provide the proper focus. Our brain is similar to a civilization's government. Our senses are like the civilization. As our civilization decreases, our brain increases its focus on our remaining senses. Just think of everything that you have missed, only because you have tried to catch everything. Unlearn.