Cats and dogs have a sixth sense - ultraviolet vision

But scientists do not know why it im



Owners curious pets could have long suspected that their pets have a sixth sense. This is partly true - researchers believe that cats and dogs have ultraviolet vision, that is, seeing what people can not see.

However, experts are not sure why this pet ability. However, it found that a lot of mammals, including hedgehogs and weasels, deer, bats, some ground mouse and moles, bees, fish, reptiles and amphibians are able to see in the ultraviolet range, which allows them to better navigate the terrain at night and some other benefits.

The light consists of a spectrum of colors, and the people are able to distinguish the color spectrum from red to violet. "Objective" of the human eye blocks the ultraviolet color, but some animals the signal reaches the retina, the light is converted into nerve signals that are processed by the brain.

Scientists already know that bees and other insects use ultraviolet vision to see patterns in plants and rodents need a vision for finding traces of urine. Why do cats and dogs, it is not yet clear.





But the big question is, why people can not accept this wavelength - the human eye, for whatever reasons, blocks ultraviolet radiation. Some scientists believe that in this way the retina is protected from damage during the day, but many animals have this ability to be active just during the day, and with their eyes all right.

Other scientists believe that such a filter in the human eye gives people the opportunity to see a clear picture: found that animals, too, UV vision is not capable, see the world more clearly dogs or cats.

People can see the world in such detail because of dense color sensitive cells (cones) in the retina, but the ability of such nocturnal creatures do not possess.

via factroom.ru