Even a three-year-old child knows that the grass is green,
the sky is blue and the snow is white. Everyone is aware that a day has 24
hours, and a minute has 60 seconds. However, there are not many who have ever wondered
if the world is really as we perceive it with our senses.
From the school course of physics we learn that colors are
nothing more than different wavelengths of the light spectrum. That may seem
quite banal, but have you ever realized the true meaning of it? That is, we see
the colors of the objects around us only because all the materials absorb some
wavelengths of light and reflect others.
I guess you already know that many animals see the world in
a different way than we do. For example, they say that dogs are blind to
certain colors, while bulls can perceive only the red color. As for cats, a
recent study showed that they have a super psychedelic vision and are able to
perceive the UV spectrum of light.
“There are plenty of things that reflect UV radiation, which
some sensitive animals are able to see, while we are not,” said Ronald Douglas,
professor of biology of the City University of London and co-author of the
study. “For example, these may be certain patterns on flowers that show where
the nectar is, or traces of urine of an animal. Also, reindeer can and see
polar bears as the snow reflects UV radiation, while white fur does not.”
What about the sound? The same story here: human senses are
very limited, and we can only hear sound frequencies in the range between 20 to
20,000 Hz. At the same time, some animals are able to perceive higher and lower
sound sequences. For example, dolphins and bats not only perceive the
ultrasound, but use it for orientation and space and even for communication.
So, what does the world look like in reality? If our senses
were unlimited, what would we see, hear and perceive? The world seen by the
human eye is like a single puzzle piece that is never going to be completed in
the whole image. The truth is that if our senses were unlimited, our brains
would probably be unable to handle the volumes of information about the
surrounding world. Visual, acoustic and other stimuli would flood our nervous
system, and we would simply go mad…
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