In The Crystal Labyrinth, only Earthlings can see in the darkness of Sunderworld's nighttime. This is because the planet's night is not as dark as Earth's, but rather is more like the amber-reddish tint of photographic darkroom.
Many natural creatures on Earth are blinded by this long wavelength of the spectrum, but we humans are only slightly hampered by this tint. The people of Sunderworld, on the other hand, cannot see in this spectrum, affording only Earthlings a highly effective night-vision.
Many natural creatures on Earth are blinded by this long wavelength of the spectrum, but we humans are only slightly hampered by this tint. The people of Sunderworld, on the other hand, cannot see in this spectrum, affording only Earthlings a highly effective night-vision.
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