by david48 » Tue Jan 31, 2012 5:03 pm
Yes, the Greys' big eyes do seem a bit enigmatic. Your suggestion that they result from the increased optical sensitivity required to navigate the Galaxy, is interesting. However such a theory would face an obvious objection:
Suppose a species is able to build starships which can fly around the Galaxy. Won't they also be able to build optical instruments to enhance their vision. Instruments like telescopes. Or "night-vision" devices, such as we've invented on Earth. These artificial aids enable humans to transcend the limitations of natural, biological vision. And intelligent aliens, like Greys, could presumably do the same. So perhaps a more plausible explanation for the large Grey eyes, could be obtained by asking:
What planet did they evolve on - what sun illuminates their home planet?
Perhaps their home planet is in a system orbiting a Red Dwarf star. That star will shed only weak light on the planet. So creatures living on the planet, such as the Greys, will need big eyes, in order to capture enough light to see their way around.
If that's the case, then their big eyes will make them "natural astronomers". Able to perceive the stars, and the Universe, superbly well. Could that be what inspired them to travel out into the Universe, and visit the Earth?