Is it true most animals (besides humans) see only in black and white?
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It's not true.\n\nMost animals don't have much in the way of eyes at all, of course, but you're probably more interested in vertebrates.\n\nMost vertebrates have very good color vision.  The primary exception is mammals.  (Snakes are also an exception, for similar reasons.)  We got a bit shafted because our ancestors in the Mesozoic (age of dinosaurs) were all nocturnal.  Nocturnal animals don't really need color vision (black & white works better in the dark), so our ancestors mostly lost it.  Then the dinosaurs died off and mammals retook the day and have been putting color vision back together ever since.\n\nMammalian color vision is, thus, not quite as good as that of the rest of the vertebrates.  Cats and dogs do have color vision, but not as good as ours, and ours isn't as good as that of most reptiles.
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I think so! Visit: http://www.bbc.co.uk/nature/animals/mammals/
1168193
It may be invisible to humans (or any other being in this reality for that matter), but white to others. Like David Icke's theory that the human brain is like a TV that can only receive one channel (or in the human's case, perceive one reality), but if we were able to change "channels" we may be able to see white angels that are invisible in our reality.
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The color which you are seeing may look differently to other person.\nIt depends on how eyes recieve the color and how the brain interprets the signals.\n\nThis is very difficult to answer. if one can be made to work with more than one brains, then probably, it can be answered correctly!!!
607436
This question is a topic of current research—several groups are measuring how fine a difference between two colors can be perceived. This type of measurement will ultimately help us determine how many colors the "average" human can perceive. The research is part of a larger field called psychophysics.\n\nColors are first detected by individual cones in the retina. These cones contain various opsin pigments, which absorb only red, green, or blue light, depending on the pigment's absorption spectrum. The information about what colors have been absorbed is sent to the visual cerebral cortex of the brain. Quite a bit of integration and processing of this signal occurs before it reaches its ultimate destination.\n\nIt is now believed that humans can perceive on the order of millions of colors. Most estimates are around 10 million. This makes sense when we consider, for example, computer monitors: We notice a difference when we switch from "thousands" to "millions" of colors. Millions in this case corresponds to 224—or 16,777,216—colors for a 24-bit display. Of course, this simple test only tells us that we can see more than "thousands" of colors, but it doesn't give us an upper limit. According to Kandel et al. (reference below), "The superiority of color perception over brightness perception is evident in the fact that we can discriminate only 500 gradations of brightness but we can discriminate more than 7 million gradations of color."\n\nBecause people vary in the overall number of cones they have and the number of each cone type, they vary in the number of colors they perceive and in what color is perceived given a particular input color at the retina.
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There is no color that can not be seen on earth. Either it exists naturally or can be created because; as has been noted many times, humans can only see within a certain spectrum range. We know the wavelengths of light and can recreated them, so no color we can see can not be seen right here on earth.
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The answer is D.  Animals with large eyes (think owls) are usually nocturnal.   Larger eyes allow for more light to come in.
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Humans have three types of color receptors (light-sensitive cells) in the retina.\n\nDogs have only two.  So dogs are not (as some people say) completely color blind.  They can distinguish between blues and yellows ... but not between reds and greens.\n\nThe technical terms are that humans are 'trichromatic', and dogs are 'dichromatic.'
871649
That is a very interesting question.\nno . . . . but there is one exception\nIn a camera flash, the light is reaching through the pigmentation\nto the retina, the light-sensitive membrane covering the back wall of the eyeball, which is the color red.\nthe only organisms that have eyes visibly red are ones that are albino\nalbino organisms have less melon(color) in there skin, hair, and eyes.\nresulting in the clear vision to their retina, which causes their eyes to be the color red.\n(i.e. white mice that have red eyes)
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sometimes.  But sometimes black and white people look similar, or any combination of people.  Ultimately we are all human, and humans look alike.
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Cats can see as well as humans,and at times better.Cat vision is designed for detecting motion,useful for hunting.Like humans,cats have binocular vision,although not as well tuned as in humans.This means a cat most likely sees in 3-D,as do humans,which is very useful for judging distance.And there are many other facts at this site http://videoforcats.com/catvision.htm
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dont know about that, but i've heard that white animals are albino, a genetic mutation
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Same reason humans have red eye -> Flash light that is sent directly to the retina (parallel to eye level) is reflected off the blood vessels at the back of the retina, hence the red color.\n\nPerhaps you see it more in dogs and cats because they reflect more light off their retina, thats how they manage to have better eye sight than humans.
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In the 1950s in Europe and the United States, it suddenly became popular to debate whether people dreamed in color or only in black and white. \n\nSome contended that we dream in black and white BUT REMEMBER OUR DREAMS IN COLOR —that is, we “paint them in” afterward. What is interesting about this debate is not the question itself but rather the time that the question came to be asked. The debate was popular in the late 1950s. Prior to this time, however, in all of the literature that exists that pertains to dreams, the question of color never came up. Freud did not raise it, nor did Jung or any other psychoanalyst of the early twentieth century. \n\nIf you have never seen a black-and-white world, it would be hard to imagine one—wouldn’t it? The cause for this debate appears to be the widespread diffusion of black-and-white television in the United States and Europe in the 1950s! It is true that people can dream in black and white; for that matter, there is no reason to discredit anyone’s claim to occasionally dreams in black and white—or purple, or Technicolor, or Day-Glo. Much as our brains effortlessly recreate our outside world with all of its vivid colors. so too can they recreate the black and white world we see in films, on television and in photographs. No one hears much about the black and white theory today. Most people have color TV sets. Now the only time we might dream in black and white is after spending long weekends watching old movies on cable.
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Most cells are opaque, or colorless.  If you want a good view, you must color it.
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Oddly enough there are only two pigments in birds and amphibians two, exactly the same two pigments. Yet we see birds and frogs in every colour of the rainbow. So we really shouldn’t be surprised to see a few bright mammals.\n \nThe way that animals usually generate blue and green colours is by utilising fibres arranged in rows or grids to refract light. That allows the skin to scatter the short blue and green wavelengths back to the observer while absorbing the longer reds. In the case of the mandrill the skin contains rows of collagen fibres designed to achieve exactly that purpose.\n\nThe only other blue mammal I know of is the vervet monkey, which has bright blue testicles. You can see a picture of one in the link below.
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If you are asking if other animals are concerned with how they look your answer is "of course". Think of any kind of male trying to attract a mate (peacock being an excellent example!). They try to have the biggest tails, brightest colors, or whatever will give them the best mate. if you are asking whether or not they can recognize themselves in the mirror, some apes can since they are so intelligent but so-called "lower mammals" cannot since they lack the brain capacity.