Cats and dogs have a 6th sense

(dogs and cats) - Dogs and cats have a sixth sense - and that is the ability to see ultraviolet rays (but scientists don't know how they are used).

British researchers found that a variety of mammals, including porcupines and ferrets, could see ultraviolet rays - more so than scientists once thought.

A biologist at the University of London said this finding could explain why organisms behave in the way they do. Experts are not sure why some animals can see ultraviolet rays that humans do not.

Pet owners may suspect that their pets seem to have a sixth sense because sometimes these animals are "frightened" even though it is no different.

Now scientists can have a way to explain the strange behavior of dogs and cats, that is, they can see ultraviolet light - see things that humans cannot.

However, experts are not sure why the animals need this ability.

The British researcher has discovered that many mammals, including porcupines and ferrets, are visible in ultraviolet light, giving them the ability to look better at night between the benefits. other.

Previously it was thought that only some mammals could see ultraviolet light, but this new study could help scientists shed some light on why animals behave in a way they often do.

Ron Douglas, a biologist at the University of London, UK, told LiveScience magazine: "Nobody thinks these animals are visible in ultraviolet rays, but in fact they do. This ability ".

White light is made up of a color spectrum and people can see light from red to purple, while many animals, such as bees, fish, reptiles and amphibians can see ultraviolet rays Ultraviolet rays have invisible wavelengths for humans.

Scientists already know that some mammals, including bats and reindeer, some species of rats and mole rats can look under ultraviolet light, but scientists aren't sure why some Animals have this ability, while others and humans do not.

The lens of the human eye prevents ultraviolet rays, but in the eyes of some animals, UV rays can penetrate and fall into the retina, when light is converted into neural signals, transmitted to the brain and is treatment in the brain.

To discover which animals are capable of looking under the light of ultraviolet light, the researchers collected the eyes of a series of mammal bodies at zoos, science laboratories or ovens. slaughter animals.

They measured and checked how much light could pass through the eye to each animal's retina.

They discovered that there are many species of animals, including dogs, cats, porcupines, ferrets and Okapi with eye lenses that allow ultraviolet rays to pass through, suggesting that these species can look in the dark. .

Scientists already know that bees and other insects use their ultraviolet vision to observe colors and patterns on plants, while rodents use it to trace water. urinating, but they are not sure what the purpose of looking at the UV rays in pets.

'The question being asked is because people cannot see ultraviolet rays , ' said Dr. Douglas.

He was interested in why the human eye lens blocked UV rays, while a scientist thought it might be to protect the retina from damage, many living animals and activities into the day, and they can see ultraviolet light whose eyes are also undamaged.

Other scientists say that ultraviolet filters in the human eye help us see more accurate and detailed images. They found that animals also blocked part of the city tour at the highest resolution vision.

People can see that clearly because, we have the density of color sensitive cells (cones) in the retina producing detailed images in low light intensity, but the births. nocturnal animals have eyes that allow as much light as possible to enter, including UV rays, but their eyes do not give images with the same level of detail as the images given by the human eye.