This is a very good question and one that I have often thought about. Why didn't such a third eye evolve? Maybe evolution just hasn't gotten there yet. Take the nature (the pathway) for the eye's evolution from photoreceptors at the single cell level to complex eyes of mammals. It likely started as one photo-sensor on the top of a single cell; evolved to a pair of eyes on each side of the head of more complex animals; to, a pair of eyes in from of the face in primates. A third eye in the back of the head could evolve perhaps in 10,000 to 100,000 years. Even a light sensitive photo sensor (requiring a minimum of supporting structures) in the back of the head that could detect change in light levels, motion, would be very useful.
Maybe we should put that on our list of new functions to genetically engineer into the human animal.
I told myself because your heart, stomach and othre delicate organs are on the front of your body, it would be a good idea to face whatever predator might attack them (evolutionarily speaking). Your back is tougher anyway.
BUT you have a point - our occipital lobes, the part of the brain for sight, are in the back of our skulls. Hmmm... why is that?
u see when u eat food, your eyes, nose and salivary glands see it and interpret it whether it is tasty or not. theywork in perfect synchronisation. if u had ur eyes at the back then you would have to carry the morsel first to the eyes then seperately to nose and mouth to interpret it .hence, i think that our eyes are in the right place! although having an extra pair at back would have given us 360 degree veiw and better protection from predators
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This is a very good question and one that I have often thought about. Why didn't such a third eye evolve? Maybe evolution just hasn't gotten there yet. Take the nature (the pathway) for the eye's evolution from photoreceptors at the single cell level to complex eyes of mammals. It likely started as one photo-sensor on the top of a single cell; evolved to a pair of eyes on each side of the head of more complex animals; to, a pair of eyes in from of the face in primates. A third eye in the back of the head could evolve perhaps in 10,000 to 100,000 years. Even a light sensitive photo sensor (requiring a minimum of supporting structures) in the back of the head that could detect change in light levels, motion, would be very useful.
Maybe we should put that on our list of new functions to genetically engineer into the human animal.
I've always wondered that!
I told myself because your heart, stomach and othre delicate organs are on the front of your body, it would be a good idea to face whatever predator might attack them (evolutionarily speaking). Your back is tougher anyway.
BUT you have a point - our occipital lobes, the part of the brain for sight, are in the back of our skulls. Hmmm... why is that?
well i dont think so
u see when u eat food, your eyes, nose and salivary glands see it and interpret it whether it is tasty or not. theywork in perfect synchronisation. if u had ur eyes at the back then you would have to carry the morsel first to the eyes then seperately to nose and mouth to interpret it .hence, i think that our eyes are in the right place! although having an extra pair at back would have given us 360 degree veiw and better protection from predators