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Ancient Eye Cells Suggest Color Vision Is 300 Million Years Old

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  • Ancient Eye Cells Suggest Color Vision Is 300 Million Years Old

    Source: http://www.livescience.com/49238-fossil-eye-cells-color-vision.html




    Ancient Eye Cells Suggest Color Vision Is 300 Million Years Old

    Fossilized rod and cone cells — the kinds that help people see — have been discovered for the first time, researchers say.

    The finding reveals that such eye cells have existed for at least 300 million years, and that the ancient fish they were discovered in likely saw in color, according to the study's scientists.

    Human vision depends on pigments that absorb light. These pigments lie inside cells known as rods and cones. Cones are sensitive to color and also help perceive fine detail and rapid changes. Rods are more sensitive to light than cones, but are not sensitive to color, and are responsible for peripheral and night vision. Both rods and cones are found in a layer of tissue in the back of the eye known as the retina.

    © Copyright Original Source

    Glendower: I can call spirits from the vasty deep.
    Hotspur: Why, so can I, or so can any man;
    But will they come when you do call for them? Shakespeare’s Henry IV, Part 1, Act III:

    go with the flow the river knows . . .

    Frank

    I do not know, therefore everything is in pencil.

  • #2
    Color me impressed.
    Learn to do right; seek justice. Defend the oppressed. Take up the cause of the fatherless; plead the case of the widow.--Isaiah 1:17

    I don't think that all forms o[f] slavery are inherently immoral.--seer

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