https://groupextradiscount.com/story/17331/ Dog research has banished the myth for good that dogs only see in white and black. An experiment in Russia on eight breeds of dogs has proved that dogs see the world in blue, yellow and lots of shades in between. For years scientists have known that dogs could see in a range of colours, but it was thought that they used levels of brightness, and not color per se, to distinguish different objects. New research found out that dogs have two types of cones in their eyes. This led scientists at the Institute for Information Transmission Problems of the Russia Academy of Sciences to suspe Read Morect they could identify colors. Humans, on the other hand, have three kinds of cones. This allows us to see all three primary colors. With only two cones, dogs must be able to see some colors, but not others. The researchers suspected dogs would for instance have the ability to see shades of blue, green and yellow, but not red and orange. The experiment was designed an experiment to evaluate this theory. First they trained several dogs to respond to one of four pieces of paper of various colors: light yellow, dark yellow, light blue and dark blue. The sheets of paper were set in pairs in front of feed boxes containing meat. The dogs soon discovered that certain colors meant a treat. Next, the scientists placed pieces of paper with the color the dogs had been taught to respond to in front of a feed box, along with another piece of paper that was brighter, but of a different color, to see if a dog trained to respond to light blue would respond to dark blue instead of light yellow. The majority of the dogs went for the color identifier rather than brightness identifier. The the scientists said this proves they are able to differentiate color and were not counting on brightness to find their food treat. Three-quarters of dogs selected the right colour more than 90 % of the time. Wed, 12 Nov 2014 11:18:05 EST en