New research suggests right-handedness prevailed 500,000 years ago

Apr 19, 2011

(PhysOrg.com) -- Research by University of Kansas professor David Frayer shows that distinctive markings on fossilized teeth correlate to the right or left-handedness of individual prehistoric humans.

Right-handedness is a distinctively human characteristic, with right-handers outnumbering lefties nine-to-one. But how far back does right-handedness reach in the human story?

Researchers have tried to determine the answer by looking at ancient tools, prehistoric art and human bones, but the results have not been definitive.

Now, David Frayer, professor of at the University of Kansas, has used markings on fossilized front to show that right-handedness goes back more than 500,000 years. He is the lead author (with colleagues in Croatia, Italy and Spain) of a paper published this month in the British journal Laterality.

His research shows that distinctive markings on fossilized teeth correlate to the right or left-handedness of individual prehistoric humans.

“The patterns seen on the fossil teeth are directly and consistently produced by right or left hand manipulation in experimental work,” Frayer said.

The oldest teeth come from a more than 500,000-year-old chamber known as Sima de los Huesos near Burgos, Spain, containing the remains of humans believed to be ancestors of European Neandertals. Other teeth studied by Frayer come from later Neandertal populations in Europe.

“These marks were produced when a stone tool was accidentally dragged across the labial face in an activity performed at the front of the mouth,” said Frayer. “The heavy scoring on some of the teeth indicates the marks were produced over the lifetime of the individual and are not the result of a single cutting episode.”

Overall, Frayer and his co-authors found right-handedness in 93.1 percent of individuals sampled from the Sima de los Huesos and European Neandertal sites.

“It is difficult to interpret these fossil data in any way other than that laterality was established early in European fossil record and continued through the Neandertals,” said Frayer. “This establishes that handedness is found in more than just recent Homo sapiens.”

Frayer said that his findings on right-handedness have implications for understanding the language capacity of ancient populations, because language is primarily located on the left side of the brain, which controls the right side of the body, there is a right handedness-language connection.
“The general correlation between handedness and brain laterality shows that human brains were lateralized in a ‘modern’ way by at least half a million years ago and the pattern has not changed since then,” he said. “There is no reason to suspect this pattern does not extend deeper into the past and that language has ancient, not recent, roots.”

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kevinrtrs
1 / 5 (14) Apr 19, 2011
The general correlation between handedness and brain laterality shows that human brains were lateralized in a modern way by at least half a million years ago and the pattern has not changed since then. There is no reason to suspect this pattern does not extend deeper into the past and that language has ancient, not recent, roots.

That's because language and handedness was present at the time the human beings came into existence about 6k years ago.
There is no separation of the two.
Since evolution has zero answers for the existence of human emotion, language and music, evolutionists will be forced to allow more time for its development. But pushing human evolution back into time will create an even bigger problem namely the need to explain why there are so few people on earth relative to the time available for population growth. Evolutionists will be forced to call on the usual magical catastrophic event for rescue.
ryggesogn2
1 / 5 (6) Apr 19, 2011
If your left arm is severely injured you can bleed to death very quickly.
I suspect that may be a factor in right-handedness.
Donutz
5 / 5 (9) Apr 19, 2011
@kevinrts

Please provide evidence - anything at all, anything will do - of the existance of a deity or deities. Then provide evidence - anything, however insignificant - that said deities are the slightest bit interested in us. Then provide evidence - anything, even the smallest thing - that said deities are *your* deities, rather than some other competing set of deities. Then provide evidence - anything, something more than nothing - that said deities had anything to do with the writing of the bible. Then provide evidence - even the smallest shred - that said deities intended the contents to be taken literally. Remember that the majority of xians don't believe that to be the case. Then provide evidence - anything, anything - that the people who took dictation actually managed to get it right.

When you've done all this, you can present your superstitions as a scientific theory. Until then, you're just comic relief.
CSharpner
5 / 5 (3) Apr 19, 2011
That's because language and handedness was present at the time the human beings came into existence

You know this how?
about 6k years ago.

If the universe were created 6000 years ago, why can we see objects BILLIONS of light years away?
There is no separation of the two.

Why?
Since evolution has zero answers for the existence of human emotion, language and music

OMG! Are you kidding? Of course it does!
evolutionists will be forced to allow more time for its development

Oh WOW! Kev! Do you honestly believe that the times in evolution theory are there for the purpose to account for that?
why there are so few people on earth relative to the time available for population growth

Populations can be stabilize. Certainly you know that. Yes, yes, you must know that.

continued...
CSharpner
5 / 5 (3) Apr 19, 2011
Evolutionists will be forced to call on the usual magical catastrophic event for rescue.

The guy that uses magic as the answer for everything is now criticizing magic. Let's see, in the last couple of days, Keven made the following breakthroughs:

1. Admitted that creation is a myth (or was it religion?).
2. Acknowledged that DNA changes over generations.
3. Poo-poo'd "magic" as an explanation.
4. Siad there's no evidence for a god.

Let's keep a running list of his breakthroughs.

Now, I'm going to prove magic DOES exist: Kev, explain why we can see objects billions of light years away if the universe is only 6000 years old?

POOF! I just made Kev disappear from this thread! :)

(I'm sorry to sound so rude kev, but I'm phrasing things this way to try to make a point for you to pick up on. I'm not doing it to be mean, though it may seam like it, I'm not. I honestly want you to practice some logical thinking.)
Donutz
5 / 5 (1) Apr 19, 2011
I honestly want you to practice some logical thinking.)


yeaaaahhh.... good luck with that.
Bigblumpkin36
5 / 5 (1) Apr 19, 2011
Oh, thats why people sit on their left arm till its numb and masterbate with it.
6_6
1 / 5 (7) Apr 20, 2011
500,000? time to recalibrate.. divide by 100 for actual figure.
all evidence indicates humans have only been around several thousand years.. and the earth and the universe, millions to billions (depending who's estimates you go by).
6 days?.. think about it... only on our planet earth does a "day" consist of what we now know is the exact time it takes for the globe to revolve once with reference to our solar system. The uses of the word day in that context are figurative, denoting 6 distinctive stages, or ages of indefinite length.
Donutz
5 / 5 (4) Apr 20, 2011
all evidence indicates humans have only been around several thousand years..


Please present said evidence. I'm not gonna hold my breath though.
CSharpner
5 / 5 (4) Apr 21, 2011
all evidence indicates humans have only been around several thousand years.

This is just patently false. To say this out loud, in public, should be exceptionally embarrassing for you.
and the earth and the universe, millions to billions (depending who's estimates you go by).

I've never heard anyone say millions. It's always 6000 or 13.7 billion. The fact that we can see objects 13.7 billion light years away says plenty.
only on our planet earth does a "day" consist of what we now know is the exact time it takes for the globe to revolve once with reference to our solar system.

What in the world are you talking about? One revolution is a YEAR, not a DAY! Jeesh!

Use Google to look up more evidence than you can handle for humans being around for MUCH longer than 5000 years.
Skeptic_Heretic
4 / 5 (4) Apr 21, 2011
500,000? time to recalibrate.. divide by 100 for actual figure.
No.
all evidence indicates humans have only been around several thousand years.
No.
and the earth and the universe, millions to billions (depending who's estimates you go by).
No. 4.5 billion give or take .1 billion, there is no real argument on this.
6 days?.. think about it.
Yeah, patently stupid.
only on our planet earth does a "day" consist of what we now know is the exact time it takes for the globe to revolve once with reference to our solar system.
Except when you're on Mars, which has a 24 hour day. Now all planets experience a 'day', it is merely of varying length. That is unless they're tidally locked.
The uses of the word day in that context are figurative, denoting 6 distinctive stages, or ages of indefinite length.
Oh, and how long were they?
Ethelred
5 / 5 (2) Apr 25, 2011
That's because language and handedness was present at the time the human beings came into existence about 6k years ago.
Except that this occurred 500K years ago. Just tiny problem of a mere two...

orders of magnitude.

Since evolution has zero answers for the existence of human emotion, language and music,
Sure we do. Brains, language, learning thus culture.

You however have no answer for when the Flood was. Nor for why there is NOTHING to support your beliefs except an ancient book written by ignorant men. Men who at least had an excuse for ignorance. Unlike you.

But pushing human evolution back into time
Except that it isn't a problem and you just plain lied. The world is NOT 6000 years old and there is absolutely no physical evidence that supports your claim.

Evolutionists will be forced to call on the usual magical catastrophic event for rescue.
No. You lied, again.

Ethelred
Ethelred
5 / 5 (2) Apr 25, 2011
all evidence indicates humans have only been around several thousand years..
Lie or you are incredibly ignorant. There are cities older than that. Jericho for one.

and the earth and the universe, millions to billions (depending who's estimates you go by).
false. Only billions not millions. There are multiple paths of evidence showing the Earth is billions of years old. None that it is millions much less thousands.

6 days?.. think about it.
Did. Its crap.

The uses of the word day in that context are figurative, denoting 6 distinctive stages, or ages of indefinite length.
Which are contradicted in the very next chapter of the Bible. And are contradicted by physical evidence. Flying things were not around before crawling things but that is what the Bible claims in Genesis 1.

Then there is that Flood that neither you or Kevin are willing to deal with. So when was it?

Ethelred

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