Neanderthals' large eyes 'caused their demise'

BBC News, Pallab Ghosh, Science correspondent, 13 March 2013

Neanderthals are a closely related species of human that lived in Europe
from around 250,000 years ago.

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A study of Neanderthal skulls suggests that they became extinct because they had larger eyes than our species.

As a result, more of their brains were devoted to seeing in the long, dark nights in Europe, at the expense of high-level processing.

This ability enabled our species, Homo sapiens, to fashion warmer clothes and develop larger social networks, helping us to survive the ice age in Europe.

The study is published in Proceedings of the Royal Society B.

Neanderthals are a closely related species of human that lived in Europe from around 250,000 years ago. They coexisted and interacted briefly with our species until they went extinct about 28,000 years ago, in part due to an ice age.

The research team explored the idea that the ancestor of Neanderthals left Africa and had to adapt to the longer, darker nights and murkier days of Europe. The result was that Neanderthals evolved larger eyes and a much larger visual processing area at the backs of their brains.

The humans that stayed in Africa, on the other hand, continued to enjoy bright and beautiful days and so had no need for such an adaption. Instead, these people, our ancestors, evolved their frontal lobes, associated with higher-level thinking, before they spread across the globe.

Eiluned Pearce of Oxford University decided to check this theory. She compared the skulls of 32 Homo sapiens and 13 Neanderthals.

Social networks

Ms Pearce found that Neanderthals had significantly larger eye sockets - by an average of 6mm from top to bottom.

Although this seems like a small amount, she said that it was enough for Neanderthals to use significantly more of their brains to process visual information.

"Since Neanderthals evolved at higher latitudes, more of the Neanderthal brain would have been dedicated to vision and body control, leaving less brain to deal with other functions like social networking," she told BBC News.

This is a view backed by Prof Chris Stringer, who was also involved in the research and is an expert in human origins at the Natural History Museum in London.

"We infer that Neanderthals had a smaller cognitive part of the brain and this would have limited them, including their ability to form larger groups. If you live in a larger group, you need a larger brain in order to process all those extra relationships," he explained.

The Neanderthals' more visually-focused brain structure might also have affected their ability to innovate and to adapt to the ice age that was thought to have contributed to their demise.

Neanderthal wraps

There is archaeological evidence, for example, that the Homo sapiens that coexisted with Neanderthals had needles that they used to make tailored clothing. This would have kept them much warmer than the wraps thought to have been worn by Neanderthals.

Prof Stringer said that all these factors together might have given our species a crucial advantage that enabled us to survive.

"Even if you had a small percent better ability to react quickly, to rely on your neighbours to help you survive and to pass on information - all these things together gave the edge to Homo sapiens over Neanderthals, and that may have made a difference to survival."

Neanderthals were close evolutionary cousins
of our own species, Homo sapiens

The finding runs counter to the idea that Neanderthals were not the stupid, brutish creatures portrayed in Hollywood films; they may well have been as intelligent as our species.

Oxford University's Prof Robin Dunbar, who supervised the study, said that the team wanted to avoid restoring the stereotypical image of Neanderthals.

"They were very, very smart, but not quite in the same league as Homo sapiens," he told BBC News.

"That difference might have been enough to tip the balance when things were beginning to get tough at the end of the last ice age," he said.

Up until now, researchers' knowledge of Neanderthals' brains has been based on casts of skulls. This has given an indication of brain size and structure, but has not given any real indication of how the Neanderthal brain functioned differently from ours. The latest study is an imaginative approach in trying to address this issue.

Previous research by Ms Pearce has shown that modern humans living at higher latitudes evolved bigger vision areas in the brain to cope with lower light levels. There is no suggestion though that their higher cognitive abilities suffered as a consequence.

Studies on primates have shown that eye size is proportional to the amount of brain space devoted to visual processing. So the researchers made the assumption that this would be true of Neanderthals.

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Study suggests Neanderthals died out earlier


"The Timing of Creation"– Aug  12, 2012 (Kryon Channelling by Lee Caroll) - (Text version)

“…. The First Look

About 200,000 years ago is when it literally began. The concept of the "divine seeding" of planet Earth happened at that point, and the fields metaphorically started to be ploughed. There is an issue and we're going to call it the way species work with Gaia. This is something that happened simultaneously with the grid creation of Gaia. For now we give you something that no one has thought about. When we speak of the grids of the planet, you make an assumption that these grids always existed on the planet. For the planet is old and you might say, "Well the grids have always been there." But I'm here to tell you that only one was always there, and that's the magnetic grid. But it was spiritually void. That is to say, it only had that which was created from the Earth's core movement. Today, when we talk about the grids of the planet, our conversation involves the consciousness of humanity, which is imbued upon the magnetic grid. We also tell you about the Crystalline Grid and about the Grid of Gaia consciousness. Both of these react to Human compassion.

Now, here is the puzzle: If you don't have divine Human consciousness, then what about the grids? Do they exist without the Human Being? The answer is that they needed to be created simultaneously with the seeding of divine DNA. So what the Pleiadians did was not only to start the seeds of humanity's change into divine DNA, but they created the conscious grids of Gaia as well. They had to, for the conscious grids of Gaia are a confluence of humanity's decisions brought to Gaia's energy. The consciousness that we are talking about is the spiritually sanctioned Human Being that exists with a piece of God inside him, and with DNA that has 23 chromosomes instead of the common 24 that all the others have through biological evolution.

Let us back up and say it again and make it simpler, my partner [admonition to Lee to speak more plainly]. The triad of grids on this planet that we have spoken of over and over are the consciousness grids of Gaia, and were created at the same time as the seeding of humanity with Pleiadian DNA. For all the teachings we've been giving, especially about the Crystalline Grid, these grids have been reacting to Human consciousness and compassion. Therefore, the very essence of the current Gaia energy is also related to the creation of humanity.

These are the attributes of the Pleiadians work 200,000 years ago, and it was done quantumly in ways that you have no conscious awareness of at the moment. For these things are beyond your ability to understand right now, since you are still in a single-digit dimensionality. But the result back then was "a conscious Gaia." So you might say Gaia itself was actually created quantumly from the Seven Sisters energy, just like you.

The Gaia that existed before then was still Gaia, but not as it is now. It was a Gaia that was creating the dirt on the earth and the energy of biological life of the earth. It was the mother of all life on the planet, but not a Gaia that responded to Human consciousness. That's very different. So Gaia greatly expanded when the Pleiadians came, and that was by design.

It took 110,000 years for this to settle itself, and for the ground to be ready for more than 16 species of Human Beings to leave so that only one was left. When that occurred at approximately 90,000 years ago is when you can start calibrating who Humans were and who they became.

The Others

Now, what about all of those other types of Humans, and how did they leave? I'm  going to give you an attribute of something that exists even today. This is difficult for my partner, for he has not heard this before. This information has not been brought in this fashion before. Go slowly, my partner.

The variety of species on this planet comes and goes accordingly as they are needed for the energy they create. So one of the tasks of Gaia is to create and eliminate species. When they are no longer needed for the purpose of Gaia's development, they cease to exist and they die out. If new life is necessary, if new concepts of life are needed, Gaia is cooperative and they are then created. The actual creation of species is something that environmentalists have not clearly seen. That is to say the mechanics of how it works is not fully recognized as something that is strongly coordinated with your weather. But you have already seen the mechanics of some of this in your long-term studies, for you have already noted the coming and going of many species through the ages. It's ongoing.

The Appropriateness of the Elimination of Species

Now, along come Humans and they see all this coming and going of living things, but they want to save them all - all the species that exist. For in their linear mind, all species should remain and exist, since they are here. The attribute of Gaia, however, is to eliminate them, cull them out, to bring in new ones. I just gave you the mechanics of the reasons species come and go. It's appropriate and is a natural building process for new species.

When the Pleiadians started to create the grids of the planet, Gaia cooperated in what was to come, knew the purpose, and what was needed for survival of this new spiritual Human. Gaia knew this since the energy of Gaia had seen it before [reason given below]. So the old attribute, which needed many kinds of Human Beings, slowly died out. It was natural. There was not a war. There were no horrible plagues. There were no volcanoes or tsunamis that consumed them. Through attrition, appropriateness, and 110,000 years, they disappeared.

So approximately 110,000 years ago, there was only one kind left, and this is science, for everything that you study will bear this out, and anthropologists have already seen it and have asked, "What happened back then at this time that would have eliminated these other kinds of Human variety?" It's a puzzle in science that I have just answered, for science looks only for physical events as triggers. But instead, it's the marriage of Gaia consciousness that you call "Mother Nature," which facilitated this. It's the same today when you see a variety of species diminish as Humans take over a greater portion of the earth. I'll call this "the appropriate elimination of unique life forms, which allow for the growth of global awareness and quantum evolution." Some species only exist to allow others to climb the ladder of nature, then they disappear. Gaia knows what the ladder looks like. You don't. ... ”

"The Big Picture - You Are Not Alone" - Feb 2012 (Kryon Channelling by Lee Caroll) - (Text version)