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Originally posted by GonzoSinister
Pow..... Smoking gun... they could not have done this in the dark!!! Genuis!!!
Some experts believe the network was a way of protecting man from predators while others believe that some of the linked tunnels were used like motorways are today.
Originally posted by Nicolas Flamel
The article states the possible use of the stone age tunnels:
Some experts believe the network was a way of protecting man from predators while others believe that some of the linked tunnels were used like motorways are today.
I doubt there was a direct connection between Scotland and Turkey though. They probably meant there are similar tunnels under each country.
The following story dramatizes how photopigments determine what one can see. During World War II, the United States Navy wanted its sailors to be able to see infrared signal lights that would be invisible to the enemy. Normally, it is impossible to see infrared radiation because, as pointed out earlier, the wavelengths are too long for human photopigments. In order for humans to see infrared, the spectral sensitivity of some human photopigment would have to be changed. Vision scientists knew that retinal, the derivative of vitamin A, was part of every photopigment molecule and that various forms of vitamin A existed. If the retina could be encouraged to use some alternative form of vitamin A in its manufacture of photopigments, the spectral sensitivity of those photopigments would be abnormal, perhaps extending into infrared radiation. Human volunteers were fed diets rich in an alternative form of vitamin A but deficient in the usual form. Over several months, the volunteers’ vision changed, giving them greater sensitivity to light of longer wavelengths. Though the experiment seemed to be working, it was aborted. The development of the “snooperscope,” an electronic device for seeing infrared radiation, made continuation of the experiment unnecessary (Rubin and Walls, 1969). Still, the experiment demonstrates that photopigments select what one can see; changing those photopigments would change one’s vision.
Originally posted by MikeboydUS
I would bet that humans at that time had far better vision in darkness than modern man.
Even among modern humans, if the diet is significantly controlled, it can produce significant gains in night vision and even infrared.
A significant gain in infrared would eliminate the need for any visible light source.