Eye Color Evolution in Hominids: Comparing Chimpanzees and Humans

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Discussion Overview

The discussion revolves around the evolution of eye color in hominids, specifically comparing the eye characteristics of chimpanzees, Neanderthals, and earlier hominids like Homo habilis and Homo erectus. Participants explore the implications of scleral visibility for nonverbal communication and the methods used to infer eye color from genetic data.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants note that chimpanzees have less visible sclera compared to humans, leading to questions about the eye appearance of early hominids.
  • One participant suggests that Neanderthals likely had eye colors similar to modern humans due to their recent existence, while earlier hominids may have had different characteristics.
  • There is mention of using DNA to infer eye color for early hominids, but where DNA is unavailable, conclusions are largely speculative.
  • Another participant highlights that the evolution of prominent scleras in humans may have facilitated nonverbal communication, contrasting this with the eye characteristics of chimpanzees.
  • One post emphasizes the variability in interpretations of eye color based on limited evidence, suggesting that reconstructions may involve significant guesswork.
  • Participants express differing views on the importance of knowing the eye color of hominids, with some questioning the relevance of the inquiry.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the eye color of early hominids, with multiple competing views and a general acknowledgment of the speculative nature of the discussion.

Contextual Notes

Limitations include the reliance on genetic data where available, the speculative nature of reconstructions without direct evidence, and the varying interpretations of existing literature on the subject.

Calpalned
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8) Chimpanzees have much less visible white sclera than

humans. That is, their eyes are basically just black and brown. As

a result, what do scientists think the eyes of hominids looked like?
 
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Neanderthals lived very recently, so it makes sense that they have eyes that are similar to ours. However, chimpanzees have eyes that are basically all black. Therefore, is there any way to determine the eye color of hominids more primitive than neanderthal like homo habilis, erectus etc?
 
A quick canvass of the lit suggests that early homonim eye color is being figured from DNA.
Where that is not available, it's basically guesswork.

You know you can just google for this stuff right?
 
Simon Bridge said:
You know you can just google for this stuff right?
Googling "Hominid eye color" led to "Haeckel divided humanity ... based upon... eye color" and "
The genes that control eye color are just a few out of tens of thousands of genes..." These are interesting facts about eye color, but they do not answer my question of what the eyes of our ancestors look like.

Here is what I already know: Humans evolved to have more prominent scleras (white part of eye) because that allows people to track eye movement and thus facilitate nonverbal communication. Our closest living nonhuman relatives, the chimpanzees, have eyes that are basically all black (no sclera, or at least a black one). I was curious if DNA could show whether hominin like homo erectus and homo habilis perhaps had eyes that were in between (that is less visible sclera than modern humans but more so than chimps).
 
I believe it was in one of the articles I had posted, they had brown skin and brown eyes, Peking man actually is thought to have had more European features although the bones were found in Asia, go figure, we've seen some weird things, there are also pictures in those links. I would suggest reading through everything provided and then ask for clarification, that will help to get you better answers. :oldsmile: The palomar series I had linked to in the other thread takes you through an entire series on the subject.

http://anthro.palomar.edu/homo/homo_2.htm
 
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It would also be useful to stick to just one question at a time - the answer in this thread seems to be a moving target: do you want to know what the eye colors are usually thought to be or do you want to know how eye color is assessed when doing reconstructions? Ether way, you have enough to find answers.

You won't find a direct answer to the questions in the references - you need to read between the lines.
Look at the arguments - it's mostly guesswork. You can give them purple eyes if you want. Why is it important?
 
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