DNA and brains
12 March 2007 by Stardust
As Naomi said when she emailed me this one, “too wonderful to miss out on–especially as it shows the flexibility of science and evolutionary theories!”
excerpt: The science of human evolution is undergoing its own revolution. Although we tend to see the march of species down through time as a single-file parade, with descendant succeeding ancestor in a neat line, the emerging science shows that the story of our species is far more complicated than Biblical literalists would have it—but also more complex than secular science suspected.[my emphasis] By analyzing the DNA of today’s humans as well as chimps and other species (even lice), scientists are zeroing in on turning points in evolution, such as when and how language and speech developed, and when our ancestors left Africa. DNA can even reveal how many pilgrims made that trek. At the new Hall of Human Origins at the American Museum of Natural History in New York, DNA gets equal billing with fossils. And by comparing the impressions that brains left on the inside of skulls, “paleoneurology” is documenting when structures that power the human mind arose, shedding light on how our ancestors lived and thought. Whether or not you believe the hand of God was guiding these changes, the discoveries are overturning longstanding ideas about how we became human.
Not that fossils are passé. new discoveries are pruning and reshaping humankind’s family tree as radically as bonsai. The neat traditional model in which one species gave rise to another like Biblical “begats” has been replaced by a profusion of branches, representing species that lived at the same time as our direct ancestors but whose lines died out. It’s like discovering that your great-great-grandfather was not an only child as you’d thought, but had a number of siblings who, for unknown reasons, left no descendants. New research also shows that “progress” and “human evolution” are only occasional partners. More than once in human prehistory, evolution created a modern trait such as a face without jutting, apelike brows and jaws, only to let it go extinct, before trying again a few million years later. Our species’ travels through time proceeded in fits and starts, with long periods when “nothing much happened,” punctuated by bursts of dizzying change, says paleontologist Ian Tattersall, co-curator of the American Museum’s new hall.
Read the entire article here (also link above). It’s long, but well worthwhile.

12 March 2007, on 2:43 pm
Off topic, but comic Richard Jeni took his own life over the weekend and the quote below is from one of his riffs. It’s truly one of the funniest anti-religion comment I’ve ever heard. Have you noticed how so many of the wrong people are dying? You can read Elayne Boosler’s tribute to her friend and fellow comic at
http://www.huffingtonpost.com/elayne-boosler/remembering-comedian-rich_b_43155.html
Richard Jeni on religious wars, “You’re basically killing each other to see who’s got the better imaginary friend.”
Damn and damn again.
12 March 2007, on 3:49 pm
catherine, I did see that. My son was telling me that Jeni often joked about suicide in his stand-up act. Who would have known that he was thinking about it inside. We always assume that funny guys are all happy all the time, when in fact it could be totally opposite. I don’t know how they can go out there and perform, when in their mind they are so sad.
12 March 2007, on 4:33 pm
Evolution and progress don’t ever have to occurr together; “progress” is merely a concept we apply to experience in order to understand how change affects us. Evolution produces change–not progress.
Nietzsche’s famous critique of teleology is especially pertinent here. Many (even educated and intelligent evolutionists) fall into the trap of statements such as, “We developed opposable thumbs in order to hold things.” Nietzsche claims that such thinking is backward. In fact, he suggested, the only claim we can really make is that we developed the ability to hold things becuase we developed opposable thumbs.
There’s a huge difference in those two claims.
12 March 2007, on 6:41 pm
W. Joel Brooks, thank you for making that distinction.
It seems we conflate the two. And I think our culture is more “goal-oriented” than “process-oriented”. As in, “getting that big house that announces to the world who we are”, rather than the steps we take to get there and how much it costs us in mental, physical, psychological and ethical terms. We’re more “quantity over quality”…
Very profound. I admit I haven’t read much from Nietzsche–my loss, it seems.
12 March 2007, on 7:47 pm
I see that profound distinction and I agree wholeheartedly with Neitzsche’s position.
It’s like says we learned to walk upright so we could use our forlimbs for other things, but that’s fundamentally wrong. It implies some sort of consciousness with Evolution.
It is more correct to say those hominids/primates who could walk upright more easily survived longer to pass along their genes, therefore traits which favored walking upright became dominant, therefore arms began developing differently from legs.
At least that makes more sense to me than saying we evolved x in order to do y. That’s just silly.
12 March 2007, on 11:34 pm
Since we’re talking about evolution, here is a neat link you might be interested in. The link is to a speech made by Robert Sapolsky at the Freedom From Religion Foundation convention in 2003. It outlines a naturalistic hypothesis for the emergence of belief in deities (i.e. how man evolved to believe in sky daddies):
http://ffrf.org/fttoday/2003/april/index.php?ft=sapolsky
My apologies if this has been posted here already.
13 March 2007, on 3:41 am
Good post. My favorite:
I wish we could tattoo that on the foreheads of those thick-headed creationists (backwards, so they can read it in a mirror) that blither on about the 2nd law of thermodynamics.
13 March 2007, on 3:42 am
Oh, I’m curious if I could be linked to via the blogroll? Pretty please? (he said, batting his eyelashes)
13 March 2007, on 9:54 am
KA – It is done.
(Thanks for bringing attention that our links needed to be updated…Sean always took care of that and we haven’t “cleaned house” or updated since he’s been gone.)
13 March 2007, on 12:40 pm
Stardust – thanks doll.
13 March 2007, on 1:08 pm
KA – You’re very welcome
17 March 2007, on 8:30 pm
PZ Myers has some good comments on the newsweek article:
http://scienceblogs.com/pharyngula/2007/03/scott_adams_reads_newsweek_uho.php
22 March 2007, on 6:02 pm
atheists always make me laugh. can’t ever make up their mind about evolution. exactly which one of the myriad of thoeries is the right one. of course all along they’re missing the most fundamental problem. PROOVE life from non-life. oh yeah, i forgot, atheists don’t pay attention to REAL science (law of biogenesis), just conjecture with no PROOF. how about just PROVING that information can occur without intelligence. when atheists can do that then maybe i’ll begin to feel that i have to prove there’s a god. BTW, Nietzsche believed that blacks and jews were subhuman….great guy.
22 March 2007, on 6:29 pm
big sucker – which atheists can’t make up their mind about evolution? What are the myriad of theories are you talking about? Do you even know what these theories are? Judging from your comment, you obviously don’t even know the basics about evolution. You probably don’t know the basics about Nietzsche either. Just something you heard about him in passing or what your cult leader taught you?
Here is a good site for learning about evolution: John Hawks Weblog :: paleoanthropology, genetics, and evolution
And for a simpler explanation, here is another link Evolution Explained
22 March 2007, on 7:13 pm
big sucker:
Define your terms, exactly.
http://www.answers.com/main/ntquery?s=evolution&gwp=16
1. A gradual process in which something changes into a different and usually more complex or better form. See synonyms at development.
2.
A. The process of developing.
B. Gradual development.
3. Biology.
A. Change in the genetic composition of a population during successive generations, as a result of natural selection acting on the genetic variation among individuals, and resulting in the development of new species.
B. The historical development of a related group of organisms; phylogeny.
4. A movement that is part of a set of ordered movements.
exactly which one of the myriad of theories is the right one.
Exactly? Despite what you may’ve heard, there’s really no such thing as an ‘exact’ science, as all sciences are a work in progress.
23 March 2007, on 9:13 am
Nietzsche wasn’t perfect, no one is. I respect his views about religion, doesn’t mean I have to respect all of his views.
Now gawd, on the other hand, there’s nothing about his representation that I can respect. An utter bastard.
23 March 2007, on 12:52 pm
I’ll give you guys credit for picking up on my sarcasm, but I’m not sure how smart you are. Of course I understand the general concept of evolution – I’ve been studying it for almost twenty years. The fact is there is little consensus about the details. Perhaps the most well known example of this is the debate over dinosaurs evolving into birds. But once again you’ve missed the fundamental problem. Let me try to make it simple. Science – things that can be tested and/or observed. Life from non-life – never tested, never observed, never proved (not to mention it violates scientific LAW). Evolution – requires belief in life from non-life. Religion – dogmatic belief in something that can’t be proven. Therefore evolution is a religion (or cult as you would put it). Now I don’t have a problem admitting that I believe in something I can’t prove (although I can deduce it logically), but the atheist/evolutionist is self-deluded if they can’t admit the same. Look, I know I’m not going to change your mind, but a lot of people on this blog have been brainwashed into thinking creationists are stupid. I beg to differ.
My cult leaders:
Dr. Raymond Damadian (inventor of the MRI, National Inventors Hall of Fame, many medals including the President’s Medal)
Dr. John Baumgardner (developed TERRA, the 3D model of Earth’s crust and plate tectonics)
Dr. Russell Humphreys (holds patents on laser-triggered high-voltage switch, has two awards from Sandia National Laboratories)
Dr. Patrick Young (holds patents on the manufacturing process of Kevlar)
Sir Isaac Newton (creationist)
I could go on, but it would take all day.
Your cult leaders:
Charles Darwin – author of ‘On the Origin of Species by means of Natural Selection or the Preservation of FAVOURED RACES in the Struggle for Life’. (racist theologian, yes his degree was in theology)
And we’ve already discussed Nietzsche.
Last note: your definition of biology is fine, but what you are missing is that when natural selection acts on genetic variation it always results in a LOSS of genetic information. This observable fact (science anyone?) is counter to your belief in molecules-to-man evolution.
Thank you for your time.
23 March 2007, on 4:21 pm
big suck —
With religion, there is no questioning, just a simple belief without any sort of evidence. People believe in so many different religions and superstitions simply because they want to believe and are not concerned in finding proof whether it is real or not. Where the atheist is open to evidence, most religious people will not even consider for a moment that they might be wrong.
Evolution is definitely NOT a religion. Though it might make it easier for you to dismiss an area of science by calling it a religion, that does not make it so. If you can’t tell the difference, then you spend too much time in church.
Good article by Austin Cline:
Is Evolution a Religion? Is Evolution a Religious Belief System Based on Faith?
I am certain that Sir Isaac Newton would not be one of your “cult leaders” if he was alive today. He lived in a time when people were far more ignorant and just learning about the ways of the world and universe.
23 March 2007, on 6:11 pm
& right out the gate, an ad hominem.
So what, you’ve only been studying the general concept? Perhaps I should return the favor: how smart are YOU?
I guess that comment illustrates how ‘general’ your ‘study’ has been.
Oh, please DO condescend to us. That’s always a clincher. /sarcasm off.
Okay, that’s ABIOGENESIS. Evolution is primarily about how man came about to his present state.
Wrong.
The good ole tu quoque fallacy. Geez, do you people work off the same vanilla boilerplate, or what? Evolution is a set of observational data. If you paid money for this tripe, I’d suggest you get a refund.
If you’re beggin’ sonny, you done came to the wrong place. Evolution is eminently provable. In fact, there’s about a million possible combos that would disprove evolution. Thus far? Zilch.
Tu quoque, ho-hum, usual idiocy.
100% of the scientists pre-Darwin believed in creation. Today? %1. You realize of course, that it IS possible to be a genius as well as a loon? Oh, riiighhhtt…them nasty old scientists are all in on it, it’s a conspiracy. Yeesh.
I raise you to the power of Steve.
Got it WRONG again. 1st, if anything, Darwin was more ‘liberal’ for his day than most of his colleagues (note that Agassiz, noted creationist, thought that being born other than white was a disease), 2nd, CD had a close black friend, 3rd, we don’t FOLLOW CD, we AGREE w/him, if you can’t make that essential difference, then I wonder how bright you really are, 4th, it matters not 1 jot nor tittle IF he was, it has no bearing on the scientific observations he brought to bear on the matter (he was a huge fan of Paley, didja know that?)
Here, read this:
http://scienceblogs.com/pharyngula/2007/03/was_darwin_a_racist.php
Last time: evolution’s NOT about particles-to-people. Different field altogether.
Yeah, thanks for wasting it w/the usual drooling drivel.
Evolution’s the backbone of biology. How on earth a ‘fake religion’ can be the lynch pin of a scientific field that impacts our lives on multiple levels goes to show that you ain’t as bright as you pretend to be.
23 March 2007, on 6:39 pm
I would think a handle like “big sucker” says everything about our commenter; he’s a sucker, all right. Wait, I just committed an ad hom, didn’t I?
Oh, he did it first; never mind, then. I guess he’s agreeing with us on “god is for suckers.”
23 March 2007, on 7:49 pm
[...] Since it wasn’t proseltyzing, I let him in the door. You can read the rest of his comments, and the comments of those of us who responded here. [...]
23 March 2007, on 10:02 pm
KA
I just love it when someone gets raaised to the power of Steve!
Thanks!