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The four pigments in a bird's cone cells (in this example, estrildid finches) extend the range of color vision into the ultraviolet. [1]Tetrachromacy (from Greek tetra, meaning "four" and chroma, meaning "color") is the condition of possessing four independent channels for conveying color information, or possessing four types of cone cell in the eye.
One of the oldest diplomatic documents known, by King Entemena, c 2400 BC.. Used by Sumerians and other Mesopotamian cultures beginning in the third millennium BC, clay nails, also referred to as dedication or foundation pegs, cones, or nails, were cone-shaped nails made of clay, inscribed with cuneiform, baked, and stuck into the mudbrick walls to serve as evidence that the temple or building ...
The condemnatory version states that as he made the nails to crucify Jesus Christ, the blacksmith and his kin were condemned to wander the earth and never settle. [2]The laudatory version states that a Romani stole the fourth nail of the crucifixion to repair his cart, the fourth nail being the one which would have pierced Jesus's heart, and that ever since God has granted the Romani people ...
Dichromatic color vision is enabled by two types of cone cells with different spectral sensitivities and the neural framework to compare the excitation of the different cone cells. The resulting color vision is simpler than typical human trichromatic color vision, and much simpler than tetrachromatic color vision, typical of birds and fish.
The Ming dynasty (1368-1644) was known for extremely long nails. [4] Sometimes, these nails were protected by gold- and jewel-encrusted nail guards. Servants performed personal chores for the royals so their nails did not break or become damaged. [5] Empress Dowager Cixi of China, who ruled from 1835 to 1908, was known for her long nails.
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The Enquirer featured her every few years and kept track of the progress of her nails. [2]Redmond started growing her nails in late 1978 to early 1979 and although she had originally planned to have them cut off on November 22, 2006 (as she said on her guest appearances on a couple of talk shows), she chose to keep her nails after all.
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