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Chickens ‘One-Up’ Humans in Ability to See Color

February 17, 2010

Researchers at Washington University School of Medicine in St. Louis have peered deep into the eye of the chicken and found a masterpiece of biological design.

Scientists mapped five types of light receptors in the chicken’s eye. They discovered the receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina, the light-sensing structure at the back of the eye.

“Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision,” says Joseph C. Corbo, M.D., Ph.D., senior author and assistant professor of pathology and immunology and of genetics. “Color receptor organization in the chicken retina greatly exceeds that seen in most other retinas and certainly that in most mammalian retinas.”

Corbo plans follow-up studies of how this organization is established. He says such insights could eventually help scientists seeking to use stem cells and other new techniques to treat the nearly 200 genetic disorders that can cause various forms of blindness.

Scientists published their results in the journal PLoS One.

Birds likely owe their superior color vision to not having spent a period of evolutionary history in the dark, according to Corbo. Birds, reptiles and mammals are all descended from a common ancestor, but during the age of the dinosaurs, most mammals became nocturnal for millions of years.

Vision comes from light-sensitive photoreceptor cells in the retina. Night-vision relies on receptors called rods, which flourished in the mammalian eye during the time of the dinosaurs. Daytime vision relies on different receptors, known as cones, that are less advantageous when an organism is most active at night.

Birds, now widely believed to be descendants of dinosaurs, never spent a similar period living mostly in darkness. As a result, birds have more types of cones than mammals.

“The human retina has cones sensitive to red, blue and green wavelengths,” Corbo explains. “Avian retinas also have a cone that can detect violet wavelengths, including some ultraviolet, and a specialized receptor called a double cone that we believe helps them detect motion.”

In addition, most avian cones have a specialized structure that Corbo compares to “cellular sunglasses”: a lens-like drop of oil within the cone that is pigmented to filter out all but a particular range of light. Researchers used these drops to map the location of the different types of cones on the chicken retina. They found that the different types of cones were evenly distributed throughout the retina, but two cones of the same type were never located next to each other.

“This is the ideal way to uniformly sample the color space of your field of vision,” Corbo says. “It appears to be a global pattern created from a simple localized rule: you can be next to other cones, but not next to the same kind of cone.”

Corbo speculates that extra sensitivity to color may help birds in finding mates, which often involves colorful plumage, or when feeding on berries or other colorful fruit.

“Many of the inherited conditions that cause blindness in humans affect cones and rods, and it will be interesting to see if what we learn of the organization of the chicken’s retina will help us better understand and repair such problems in the human eye,” Corbo says.

Funding from the National Eye Institute supported this research.

Comments

77 Responses to “Chickens ‘One-Up’ Humans in Ability to See Color”

  1. Andrew Crisp 1st on February 17th, 2010 5:38 pm

    1.They discovered the receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina.
    2.Birds, now widely believed to be descendants of dinosaurs, never spent a similar period living mostly in darkness. As a result, birds have more types of cones than mammals.
    3.Most avian cones have a specialized structure that Corbo compares to “cellular sunglasses.
    4.Corbo speculates that extra sensitivity to color may help birds in finding mates, which often involves colorful plumage, or when feeding on berries or other colorful fruit.
    5.Many of the inherited conditions that cause blindness in humans affect cones and rods.

  2. Ryan Chamberlain 1st Period:D on February 17th, 2010 8:03 pm

    Article Summary

    1.Researchers at Washington University have peered deep into the eye of the chicken and found a masterpiece of biological design.

    2.Scientists mapped five types of light receptors in the chicken’s eye.

    3.“Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision,” says one of the scientists named Joesph Corbo.

    4.Corbo plans follow-up studies of how this organization is established.

    5.”Birds likely owe their superior color vision to not having spent a period of evolutionary history in the dark.” says Corbo

  3. Brandon Archer 5th period on February 20th, 2010 3:53 pm

    1. 5 types of light receptors in the chickens eye.

    2. The receptors are laid out interwoven mosaics.

    3. The light sensing structures are in the back of the chickens eye.

    4. Birds have clearly one up us in vision.

    5. Scientist think that birds eye sight is so good because they have spent most of there history in the dark.

  4. Ruhi- 2nd period on February 21st, 2010 6:39 pm

    1. Researchers peered deep into a chickens eye and found masterpiece of biological design.
    2. Scientists mapped five kinds of light receptors in the chickens eye.
    3. Receptors are laid out in interwoven mosaics in a chickens eye.
    4. Birds have better color vision than humans do.
    5. Birds, reptiles, and mammals are all descended from a common ancestor.

  5. Tonya Heathington 1st period on February 21st, 2010 9:18 pm

    1. Scientists have peered deep into the eye of the chicken and found a masterpiece of biological design.
    2.“Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision,” says scientists.
    3.Birds likely owe their superior color vision to not having spent a period of evolutionary history in the dark, according to Corbo.
    4. Birds, reptiles and mammals are all descended from a common ancestor.
    5. Scientists found that the different types of cones were evenly distributed throughout the retina.

  6. Julia Harrelson 5th Period on February 21st, 2010 10:29 pm

    1. Researchers have been peering into the eye of the chickern.
    2. The reseachers have found a masterpiece of the bological design.
    3. Scientists have mapped five ty[es of receptors in the eye of a chicken.
    4. They found out that the receptors were laid out in the interwoven mosacis that made the chicken’s ability to see many colors.
    5. Scientist might have a cure that treat up to 200 different gentic disorders.

  7. Chase Massey, 5th Period on February 22nd, 2010 8:45 am

    1. Corbo plans follow-up studies of how this organisation is established.
    2. Vision comes from light-sensitive photocepter cells in the retina.
    3. Scientists published their results in the journal PLoS One.
    4. Birds are now widely believed to be the descendants of dinosaurs.
    5. Scientists have mapped five types of light recepters in the chicken’s eye.

  8. Chase Massey, 5th Period on February 22nd, 2010 8:46 am

    1. Corbo plans follow up studies of how this organisation is established.
    2. Vision comes from light-sensitive photocepter cells in the retina.
    3. Scientists published their results in the journal PLoS One.
    4. Birds are now widely believed to be the descendants of dinosaurs.
    5. Scientists have mapped five types of light recepters in the chicken’s eye.

  9. Robert McClintock 2nd on February 22nd, 2010 4:50 pm

    Science discovered 5 light recepters in a chicken’s eye. The receptors gives the chicken the ability to see many colors in any given part of the retina. the light-sensing structure is located at the back of the eye. Night-vision relies on receptors known as rods, which flourished in the mammalian eye during the time of the dinosaurs. Since birds never spent a period of time like mammals in the darkness, they have more types of cones than mammals.

  10. Kris L. 2nd period on February 22nd, 2010 4:53 pm

    1.Researchers at Washington University School of Medicine in St. Louis have peered deep into the eye of a chicken and found something cool.
    2.Scientists mapped five types of light receptors in the chicken’s eye.
    3. They discovered the receptors were laid out in interwoven mosaics.
    4.Corbo plans follow-up studies of how this organization is established.
    5.Birds, now widely believed to be descendants of dinosaurs, never spent a similar period living mostly in darkness.

  11. Rachel whorton 2nd on February 22nd, 2010 4:55 pm

    1) Scientists mapped five light receptors in the chickens eye.
    2) Vision comes from light sensitive photoreceptor cells in the retina.
    3)Birds are desendants of dinosaurs.
    4) The human retina has cones sensitive to red, blue, and green wavelengthes.
    5)Many of the inherited conditions that cause blindness in humans affects cones and rods.

  12. Zach Bennett 1st period on February 22nd, 2010 5:23 pm

    The receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any part of the retina.

    The light sensing structure at the back of the eye.

    Birds likely owe their superior color vision to not having spent a period of time in history in the dark.

    Birds, now believe to be descendants of dinosaurs, never spent a similar period living mostly in darkness.

    Birds have more types of cones than mammals.

  13. Takara Alexander 5th pd on February 22nd, 2010 5:39 pm

    1. scientists mapped five types of receptors in the chicken’s eye.
    2.Vision comes from light-sensitive photoreceptor cells in the retina.
    3.Night visions receptors are called rods.
    4.Scientist from Washington university school of medicine in St.Louis peered deep into the eye of a chicken.

    5.scientists publish their results in a journal ”Plus one”.

  14. Crystal Whitehouse --- 6th Period on February 22nd, 2010 6:11 pm

    ~ Scientists mapped five types of light receptors in the chicken’s eye
    ~ Receptors laid out in interwoven mosaics maximized the chicken’s ability to see many colors in any given part of the retina, the light-sensing structure at the back of the eye
    ~ Birds likely owe their superior color vision to not having spent a period of history in the dark
    ~ Birds never spent a similar period living mostly in darkness, and as a result, birds have more types of cones than mammals
    ~ Vision comes from light-sensitive photoreceptor cells in the retina

  15. amari anderson- ortiz p.1 on February 22nd, 2010 6:26 pm

    1. There was a masterpiece of biological design found deep in a chicken’s eye.

    2. They discovered the receptors were laid out that made chicken’s able to see many colors.

    3. Birds owe their superior color vision to not having spent a w hole period of evolutionary history in the dark.

    4. Vision comes from light-sensitive photoreceptor cells in the retina.

    5. Birds are now widely believed to be descendants of dinosaurs.

  16. Summer Berthelson-4th period 2/22/09 on February 22nd, 2010 6:31 pm

    - The super vision helps birds find mates
    - The human retina has become sensitive to red, blue, and green wavelengths
    - Chickens have five 5 types of receptors in thier eyes, so they see many colors on the retina
    - Birds might owe thier vision to not spending alot of time in the dark during the dinosaur age
    - Night vision relies on receptors called rods, which flourished in mammels in the age of the dinosaurs

  17. Pamela Hussey-6th Period on February 22nd, 2010 6:32 pm

    -St. Louis have peered deep into the eye of the chicken and found a masterpiece of biological design.
    -Scientists mapped five types of light receptors in the chicken’s eye.
    -Scientists have published their results in the journal PLoS One.
    -Birds, reptiles, and mammals are all descended from a common ancestor.
    -Corbo speculates that extra sensitivity to color may help birds to find their mates.

  18. TARRELL CLEMONS 1st PERIOD 2-22-10 on February 22nd, 2010 7:33 pm

    1) Researchers at Washington University School of Medicine in St. Louis have peered deep into the eye of the chicken and found a masterpiece of biological design.

    2) Scientists mapped five types of light receptors in the chicken’s eye.

    3) . They discovered the receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina, the light-sensing structure at the back of the eye.

    4) “Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision,” says Joseph C. Corbo, M.D., Ph.D., senior author and assistant professor of pathology and immunology and of genetics.

    5) Birds likely owe their superior color vision to not having spent a period of evolutionary history in the dark, according to Corbo.

  19. John Parvin McBride 2nd Period on February 22nd, 2010 7:34 pm

    1.) Researchers have looked into the eye of a chicken
    2.) They have seen a masterpeice of design.
    3.)Scientists mapped five types of light receptors in the chicken’s eye.
    4.)They discovered the receptors were laid out in interwoven mosaics.
    5.)They are maximized the chicken’s ability to see many colors in any given part of the retina.

  20. Lucas seibel on February 22nd, 2010 8:09 pm

    1.scientist decide to look deeper into a chickens eye.
    2.Birds have better vision when it comes to color compared to humans.
    3.scientists can use stem cells to cure up to 20 different cases of blindness
    4.birds used to spend most of there early life in the dark
    5.The human eye sees red green and blue the best

  21. deondre surles6th period on February 22nd, 2010 8:20 pm

    Scientists mapped all kinds of lights.

    Bright lights can cause blindness.

    Sensitive colors can help birds find mates.

    Our retina is attracted to red blue and green.

    Birds have good color fision.

  22. Connor Ferguson 2nd period on February 22nd, 2010 9:02 pm

    1.scientists mapped 5 light recepters in a chicken’s eye.
    2.The recepters maximized the chicken’s ability to see many colors in the retina.
    3.Vision comes from photorecepters in the retina.
    4.Birds have super color vision.
    5.The human retina is sensitive to green,red, and blue

  23. Elijah Hurskin 4th period 2/22/10 9:46 pm on February 22nd, 2010 10:46 pm

    1)Researchers at Washington University School of Medicine peered deep into the eye of the chicken and found a masterpiece of biological design.
    2)Scientists mapped five types of light receptors in the chicken’s eye
    3)They discovered the receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina, the light-sensing structure at the back of the eye.
    4)Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision
    5)Vision comes from light-sensitive photoreceptor cells in the retina

  24. Andrew Hall 1st on February 23rd, 2010 8:43 am

    1) Chickens have five different receptors in their retinas.

    2)Corbo plans follow-up studies of how this organization is established. He says such insights could eventually help scientists seeking to use stem cells and other new techniques to treat the nearly 200 genetic disorders

    3)The human retina has cones sensitive to red, blue and green wavelengths.

    4)In addition, most avian cones have a specialized structure that Corbo compares to “cellular sunglasses”: a lens-like drop of oil within the cone that is pigmented to filter out all but a particular range of light.

    5)Many of the inherited conditions that cause blindness in humans affect cones and rods, and it will be interesting to see if what we learn of the organization of the chicken’s retina will help us better understand and repair such problems

  25. Devin Platts 1st on February 23rd, 2010 3:10 pm

    1. Chickens can see color better than humans.
    2.Birds likely owe their superior color vision to not having spent a period of evolutionary history in the dark, according to Corbo.
    3.Vision comes from light-sensitive photoreceptor cells in the retina.
    4.Most avian cones have a specialized structure that Corbo compares to cellular sunglasses

  26. Tara Harville 1st per. on February 23rd, 2010 6:49 pm

    1. Scientists mapped five types of light receptors in the chicken’s eye.
    2. The receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina.
    3. Birds likely owe their superior color vision to not having spent a period of evolutionary history in the dark.
    4. Vision comes from light-sensitive photoreceptor cells in the retina.
    5. Birds never spent a similar period living mostly in darkness.

  27. Madeline Holifield 4th on February 25th, 2010 5:09 pm

    1.Researchers have peered deep into the eye of the chicken and found a masterpiece of biological design.
    2.Birds likely owe their superior color vision to not having spent a period of evolutionary history in the dark.
    3.Vision comes from light-sensitive photoreceptor cells in the retina.
    4.Birds, now widely believed to be descendants of dinosaurs, never spent a similar period living mostly in darkness. As a result, birds have more types of cones than mammals.
    5.Corbo speculates that extra sensitivity to color may help birds in finding mates, which often involves colorful plumage, or when feeding on berries or other colorful fruit.

  28. Sarah Christopherson 5th on February 25th, 2010 7:45 pm

    1. Scientists have mapped 5 types of receptors in the eye of a chicken
    2. scientists can use stem cells to cure up to 20 different cases of blindness
    3.”Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision” says Joseph C. Corbo
    4.Joseph C corbo a M.D., Ph.D., senior author and assistant professor of pathology and immunology and of genetics.
    5.Scientists published their results in the journal PLoS One.

  29. Xavier Robinson on February 27th, 2010 12:42 pm

    1.Researchers have looked into the eye of a chicken.
    2.Scientists have mapped five tyes of receptors in the eye of a chicken.
    3.The receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina.
    4.Birds have better color vision than humans do.
    5.Vision comes from light-sensitive photoreceptor cells in the retina.

  30. Kerry Dunn- 4th on February 28th, 2010 12:29 pm

    Birds have great color vision from not having spent a period of evolutionary history in the dark. Most mammals became nocturnal for millions of years. Since birds did not spend as much time in the dark during the age of the dinosaurs, birds have more types of cones than mammals. The human retina has cones sensitive to red, blue, and green wavelengths. Vision comes from the light-sensitive photoreceptor cells in the retina.

  31. Kaila Poleon 4th Period on March 1st, 2010 8:39 am

    1. Scientists have looked deep into the eye and discovered a masterpiece of a biological design.

    2. There are 5 light receptors in the chickens eye.

    3. Receptors were laid out in interwoven mosaics that maximized the ability in chickens to see colors.

    4. Most likely, chickens have there amazing ability of sight because they did not spend an entire evolutionary history in the dark.

    5. Bird’s extra sensitivity of light may help them find mates.

  32. natalie seavers 6th on March 1st, 2010 1:33 pm

    1. 5 types of receptors
    2. birds never spend as much time as we do in the dark
    3.Vision comes from light-sensitive photoreceptor cells in the retina
    4.The human retina has cones sensitive to red, blue and green waveleng
    5. chickens have five diffrent receptors in there retina

  33. Elizabeth Sanders 1st period on March 1st, 2010 4:32 pm

    Article Summary for March 1st, 2010
    1.) Vision comes from light-sensitive photoreceptor cells in the retina.
    2.) .Birds have better vision when it comes to color compared to humans.
    3.) Researchers have looked into the eye of a chicken.
    4.) The light sensing structure at the back of the eye.
    5.) The human retina is sensitive to green,red, and blue.

  34. hunter walker-1 on March 1st, 2010 4:38 pm

    Researchers have looked into the eye of a chicken.
    Scientists have mapped five tyes of receptors in the eye of a chicken.
    The receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina.
    Birds have better color vision than humans do.
    Vision comes from light-sensitive photoreceptor cells in the retina

  35. Andrew Patterson on March 1st, 2010 6:19 pm

    Scientist have discovered there are many stem cells in the body. Scientist do lots of research.

  36. Kathryn Wilson 4th on March 1st, 2010 6:30 pm

    1.Researchers looked into the eye of the chicken and found a biological design.
    2. Scientists have mapped five types of receptors in the eye of a chicken.
    3.Birds have clearly one-upped us in several ways in color vision.
    4.Birds now believed to be descendants of dinosaurs, never spent a similar period living mostly in darkness.
    5.Corbo speculates that extra sensitivity to color may help birds in finding mates, which often involves colorful plumage, or when feeding on berries or other colorful fruit.

  37. Owen Clarke 4th on March 1st, 2010 6:35 pm

    Birds have 5 light receptors.
    They have more cones than mammals.
    Eyesight helps birds find mates or food.
    Examining they chickens retina will lead to being able to fix the hukman eye.
    cones cannot be next to the same kind of one another.

  38. Andrew Rice on March 1st, 2010 7:31 pm

    Andrew Rice5th period march the first
    1. Researchers have looked into the eye of a chicken.
    2.Scientists mapped five types of light receptors in the chicken’s eye.
    3. Chickens can see color better than humans.
    4.Our retina is attracted to red blue and green.
    5.They are maximized the chicken’s ability to see many colors in any given part of the retina.

  39. Taylor Brown (period 5) on March 1st, 2010 7:43 pm

    1.Researchers at a medical school in St. Louis (Washington University Medical School to be exact) lokked deep into the eyes of a chicken
    2.There are 5 types of light receptors in a chicken eye
    3.The receptors were in an “interwove mosaic” that helped the chickens to see many colors
    4.The retina is alight seeing structure at the back of the eye
    5.The human retina has cones sensitive to red, blue and green wavelengths,” said a researcher

  40. madison 5th on March 1st, 2010 8:17 pm

    1St. Louis have peered deep into the eye of the chicken and found a masterpiece of biological design.
    2. scientists can use stem cells to cure up to 20 different cases of blindness3. 3The light sensing structures are in the back of the chickens eye.
    4.Birds, now widely believed to be descendants of dinosaurs, never spent a similar period living mostly in darkness. As a result, birds have more types of cones than mammals.
    5.Corbo speculates that extra sensitivity to color may help birds in finding mates, which often involves colorful plumage, or when feeding on berries or other colorful fruit.

  41. claire Lorino 4th on March 1st, 2010 9:32 pm

    1.Scientists have looked at 5 types of receptors in the eye of a chicken.
    2. These receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina.
    3.Vision comes from light-sensitive photoreceptor cells in the retina.
    4.Corbo speculates that extra sensitivity to color may help birds in finding mates, which often involves colorful plumage, or when feeding on berries or other colorful fruit.
    5people think birds were descendants of dinosaurs, never spent a similar period living mostly in darkness. As a result, birds have more types of cones than mammals.

  42. alex 4th period on March 1st, 2010 9:33 pm

    1 Researchers at Washington University School of Medicine in St. Louis have looked at chicken’s eyes and found an interesting discovery.

    2 Birds probably owe their great color vision by not having spent a period of evolutionary history in the dark.

    3 Scientists have found five tyes of receptors in the eye of a chicken.

    4 Birds are desendants of dinosaurs.

    5 The light sensing structure is in the back of the eye.

  43. Savannah Watson 2nd on March 1st, 2010 9:36 pm

    1. birds have better eyes sight for color that humans.
    2. this could be used to help 200 engetic disorders
    3. Birds enchanced eye sight couldf come from spending years in the dark.
    4. sight comes from photoreceptor cells in the retina.
    5. the human retania can see red blue and green

  44. Kaylee Thom 4th on March 1st, 2010 10:00 pm

    1. The eye of a chicken has masterful design.
    2. There are 5 types of light receptors in a chickens eye.
    3. Vision comes from photoreceptor cells in the back of the eye.
    4. Receptor organization in the chicken retina greatly exceeds that seen in most other retinas and certainly that in most mammalian retinas.
    5. Many of the inherited conditions that cause blindness in humans affect cones and rods.

  45. Raine Aslan - 4th period on March 1st, 2010 10:03 pm

    1. Scientsts looked into the eye of the chicken.
    2. They mapped five types of light receptors in the chicken’s eye.
    3. Birds likely owe their superior color vision to not having spent time in the dark.
    4. Vision comes from light-sensitive photoreceptor cells in the retina.
    5. Birds have better color vision than humans do.

  46. Avery Wilson 4th Period on March 1st, 2010 10:09 pm

    Researchers peered deep into the eye of a chicken.
    They mapped five types of light receptors in the eye.
    Birds have advanced humans in color vision.
    Birds are desendants of dinosaurs.
    The human retina has cones sensitive to red blue and green wavelengths.

  47. Brett Baird 4th on March 1st, 2010 10:15 pm

    -vision comes from light-sencitive photorecepter cells in the retrina
    - color reeception in a chicken is much more exceedingly than in most ather mammels
    -birds are beleived to be desendants of dinausaurs
    -alot of blind people have effected cones and rods
    -birds never spent a period living in the darkness

  48. Dylan Clark 4th period on March 1st, 2010 10:46 pm

    1) Researchers at Washington University School of Medicine in St. Louis have peered deep into the eye of the chicken and found a masterpiece of biological design.
    2) Scientists mapped five types of light receptors in the chicken’s eye.
    3) They discovered the receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina, the light-sensing structure at the back of the eye.
    4) “Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision,” says Joseph C. Corbo, M.D., Ph.D., senior author and assistant professor of pathology and immunology and of genetics.
    5) Corbo plans follow-up studies of how this organization is established. He says such insights could eventually help scientists seeking to use stem cells and other new techniques to treat the nearly 200 genetic disorders that can cause various forms of blindness.

  49. Scott Urban 5th period on March 3rd, 2010 9:30 pm

    1. school of Medicine in st. Lois have peered deep into the eye of the chicken and found a masterpiece of biological design

    2. chickens can see better color vison then people

    3. birdds likely owe their color vision to not having spent a period of evolutionary history in the dark

    4. Sceintz mapped five types of light receptors in the chicken’s eye

    5. Eyesight helps birds find mates or food

  50. Reagan Locke 4th on March 7th, 2010 9:05 pm

    Scientists mapped five kinds of light receptors in the chickens eye. These receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina. Birds, now widely believed to be descendants of dinosaurs, never spent a similar period living mostly in darkness. As a result, birds have more types of cones than mammals.Corbo speculates that extra sensitivity to color may help birds in finding mates, which often involves colorful plumage, or when feeding on berries or other colorful fruit. Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision

  51. Emily Woodard on March 8th, 2010 12:29 pm

    1 Researchers at Washington University School of Medicine in St. Louis have looked at chicken’s eyes and found an interesting discovery.
    2 Birds probably owe their great color vision by not having spent a period of evolutionary history in the dark.
    3 Scientists have found five tyes of receptors in the eye of a chicken.
    4 Birds are desendants of dinosaurs.
    5 The light sensing structure is in the back of the eye.

  52. Andrew Patterson on March 8th, 2010 7:01 pm

    theyre have been many discoveries about chicken.

  53. Caroline Whorton 6th period on March 8th, 2010 7:02 pm

    1. Researchers found a desighn in the chicken eye.
    2. In the retina, chickens can see many colors.
    3. Birds can see color because they do not spend any time in the dark.
    4. Animals can become noctural for a lot of years.
    5. Conitions in human blindness, can also can affect cones and rods.

  54. Amanda Baer-Peckham 4th period on March 8th, 2010 8:53 pm

    Chicken’s eyes have five different types of light receptors. Color receptors organization in the chicken retina exceeds most other retinas. Such insights could eventually be used to treat 200 genetic disorders that cause blindness. Birds owe their excellent color vision to not having to live in the dark for a certain period in time. Reptiles, mammals, and Birds are all descendents from a common ancestor, but during the age of the dinosaurs most animals were nocturnal. Now we believe that birds are decedents of dinosaurs.

  55. brett stoddard 5th period on March 8th, 2010 9:16 pm

    1).Researchers at Washington University of medicine is studying in the eye of a chicken.
    2).Scientists marked the five types of light receptors in the chicken’s eye.
    3).They discovered were the receptors laid.
    4).Night-vision relies on receptors called rods.
    5).The reseach was funded from the National Eye Institute

  56. Allison Dreisewerd - 4th on March 8th, 2010 9:43 pm

    1. Birds have better vision when it comes to color compared to humans. 2. Researcher have peered deep into the chickens eyes. 3. They found a masterpiece of biological design. 4. The human retina is sensitive to red, green, and blue.
    5. Scientist have published their results.

  57. Drake Horner 1st on March 10th, 2010 12:20 pm

    1).Vision comes from photorecepters in the retina.
    2)Birds have super color vision.
    3)The human retina is sensitive to green,red, and blue
    4)Birds have better color vision than humans do.
    5)Vision comes from light-sensitive photoreceptor cells in the retina

  58. Andrew Patterson on March 22nd, 2010 3:45 pm

    Chickens are good to eat.

  59. Cassidy McCarter-4th on March 22nd, 2010 3:56 pm

    1.Researchers have peered deep into the eye of the chicken and found a masterpiece of biological design.
    2.Scientists mapped five types of light receptors in the chicken’s eye.
    3.The scientists discovered the receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors.
    4.“Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision,” says Joseph C. Corbo
    5.Birds likely owe their superior color vision to not having spent a period of evolutionary history in the dark, according to Corbo

  60. derrellpatton1stperiod on March 22nd, 2010 5:29 pm

    1. Researchers looked deep into a chickens eye and found a masterpiece of biological design.

    2. Scientists mapped five kinds of light receptors in the chickens eye.

    3. Receptors are put out in interwoven mosaics in a chickens eye.

    4. Birds have better color vision than humans do.

    5. Birds, reptiles, and mammals are all descended from a common ancestor.

  61. Shaquera Wade on March 22nd, 2010 5:42 pm

    1.Birds have super color vision.
    2.Eyesight helps birds find mates or food.
    3.Our retina is attracted to red blue and green.
    4.birds have better eyes sight for color that humans.
    5.Birds are desendants of dinosaurs.

  62. emily wye 4th on March 22nd, 2010 6:13 pm

    1. researchers at wusm have looked into a chikens eye and have found an interesting disovery.

    2. chickens can see better than humans

    3.scientist have mapped five types of light receptors

    4. birds likely owe their superiiior color vision too not having spent a period of evelotion history in the dark

  63. Courtney Terry 4th on march 22,2010 on March 22nd, 2010 6:54 pm

    1. Birds have super color vision.
    2. Scientist have published their results.
    3. They found a masterpiece of biological design.
    4. The human retina is sensitive t red,green,and blue.
    5. vision comes from light-sensitive photoreceptor cells in the retina.

  64. hunter walker-1 on March 29th, 2010 4:24 pm

    1. Birds have more color vision than humans.
    2. Night-vision relies on receptors called rods.
    3. Birds are descendents of dinosaurs.
    4. Scientsts looked into the eye of the chicken.
    5. The bird retina is sensitive to red,green,and blue.

  65. Devin Platts 1st on March 30th, 2010 6:58 am

    1.scientists mapped 5 light recepters in a chicken’s eye.
    2.The recepters maximized the chicken’s ability to see many colors in the retina.
    3.Vision comes from photorecepters in the retina.
    4.Birds have super color vision.
    5.The human retina is sensitive to green,red, and blue

  66. Andrew Patterson on March 30th, 2010 7:49 pm

    chickens are cowards.

  67. joshua sanchez-6 on April 3rd, 2010 9:10 pm

    1.Students at Washington University School of Medicine in St. Louis studied this.
    2. Scientists mapped 5 types of light receptors in the chickens eye.
    3. Birds have clearly one-uped us in color vision.
    4. The light senceing structure in in the back of the eye.
    5. Scientists published their results in the journal PLoS One.

  68. austin xayavong 5th on April 4th, 2010 9:59 pm

    1.St. Louis have peered deep into the eye of the chicken and found a masterpiece of biological design.
    2.Chickens can see better color vison then people.
    3.Scientists marked the five types of light receptors in the chicken’s eye.
    4.They discovered the receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina, the light-sensing structure at the back of the eye.
    5.The human retania can see red blue and green.

  69. Shaquera wade 6 on April 5th, 2010 2:10 pm

    1.Researchers at Washington University have peered deep into the eye of the chicken and found a masterpiece of biological design.
    2. Scientists mapped five kinds of light receptors in the chickens eye.
    3. They found a masterpiece of biological design
    4.“Based on this analysis, birds have clearly one-upped us in several ways in terms of color vision,” says Joseph C. Corbo
    5. The light sensing structure is in the back of the eye.

  70. Will Cook 4th Period on April 5th, 2010 8:12 pm

    1- birds have super color vision
    2- scientists mapped 5 different kinds of light receptors in the chickens eye
    3- chickens can see better than humans
    4- night vision relies on receptors called ‘rods’
    5- research was fnded from the national eye institute

  71. mauhaun taheri 1 on April 5th, 2010 8:40 pm

    1. There are 5 types of light receptors in the chicken eye.
    2.Birds have super color vision.
    3.The eyesight helps bird find food.
    4.They found a masterpiece of biological design.
    5. Birds are decedents of dinosaurs.

  72. Maysie Spears 4th period on April 5th, 2010 9:15 pm

    1. Researchers have peered deep into the eye of the chicken and found a masterpiece of biological design.
    2. Scientists have found five different light receptors in the chicken’s eye.
    3. These light receptors have abled the chicken to see many different colors in the retina.
    4. Vision comes from light-sensitive cells in the retina.
    5. Based on the analysis birds have one-uped us when in comes to vision.

  73. hunter walker-1 on April 26th, 2010 3:37 pm

    1. The vision comes from light cells in the retina.
    2. Birds have better color vision than humans.
    3. Based on the analysis birds have one-uped us when in comes to vision.
    4. Eyesight helps birds find mates or food.
    5. Scientists mapped 5 light recepters in a chicken’s eye.

  74. Celia Farrell 1st Period on May 4th, 2010 6:56 pm

    1. Scientists decided t look deeper in chickens’ eye’s.

    2. There are 5 types of light receptors in a chickens eye.

    3. Bird’s are decendants of dinosaur’s.

    4. Vision comes from light-sensitive photoreceptor cells in the retina.

    5. The human retina is sensitive to red,green, & blue.

  75. austin xayavong 5th on May 8th, 2010 5:30 pm

    1.The super vision helps birds find mates and stuff.
    2.Researchers at Washington University School of Medicine in St. Louis have looked at chicken’s eyes and found an interesting discovery.
    3.Birds likely owe their superior color vision to not having spent a period of evolutionary history in the dark, according to Corbo.
    4.They have seen a masterpeice of design.
    5.Scientists published their results in the journal PLoS One.

  76. John Baudendistel - 4th on May 10th, 2010 4:20 pm

    1.They discovered the receptors were laid out in interwoven mosaics that maximized the chicken’s ability to see many colors in any given part of the retina.
    2.Birds, now widely believed to be descendants of dinosaurs, never spent a similar period living mostly in darkness. As a result, birds have more types of cones than mammals.
    3.Most avian cones have a specialized structure that Corbo compares to “cellular sunglasses.
    4.Corbo speculates that extra sensitivity to color may help birds in finding mates, which often involves colorful plumage, or when feeding on berries or other colorful fruit.
    5.Many of the inherited conditions that cause blindness in humans affect cones and rods.

  77. Jenna Marshall 1st period on May 10th, 2010 7:49 pm

    ~Researchers have found a biological masterpeice in the eye of a chicken.

    ~Birds have ‘one-upped’ us in the terms of color vision.

    ~Vision comes from light-sensitive cells in the retina.

    ~Night vision relies on recepters that are called ‘rods.’

    ~Day-vision relies on other receptors know as ‘cones’.

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