If the history of science over the last 450 years has taught us anything, it is that there is a major mismatch between perception and reality. The invisible forces so important to our understanding of the world—from heliocentrism and gravity to evolution and microorganisms—were discovered only by scientists bold and radical enough to see what everyone else was blind to. It is only through the extension of our senses and the transcendence of our cognitive limitations that we have made any progress in our knowledge of the world at all.
That human sensation and perception is limited is a major understatement: humans can see less than 1 percent of the electromagnetic spectrum (visible light), making us literally blind to 99 percent of it. Other animals can not only see better and farther than us, many have greater sensitivity to a wider range of colors while others can see ultraviolet and infrared light and even magnetic fields. We are deaf to most frequencies and incapable of experiencing many smells, tastes, and sensations. We are blind to the smallest scales (and to the trillions of bacterial cells that inhabit our bodies) and to the farthest reaches of the known universe (46 billion light-years across).