Tag Archives: Intelligence

How brief was the period in which the Cambrian phyla suddenly appeared?

The Cambrian explosion refers to the sudden appearance of new body plans in the fossil record. ID proponents think that the period is between 5-10 million years at the most. Naturalists want to stretch out the period in which the body plans appear to tens of millions of years. The two sides can’t both be right. What’s the truth?

Evolution News has the answer.

Excerpt:

To establish the length of the most explosive period of innovation within the Cambrian explosion itself, Meyer cites the work of MIT geochronologist Samuel Bowring and his colleagues as well the work of another group led by Smithsonian paleontologist Douglas Erwin. The Bowring-led study showed that (in their words) “the main period of exponential diversification” within the Cambrian lasted “only 5-6 million years” (emphasis added). Meyer explains:

An analysis by MIT geochronologist Samuel Bowring has shown that the main pulse of Cambrian morphological innovation occurred in a sedimentary sequence spanning no more than 6 million years. Yet during this time representatives of at least sixteen completely novel phyla and about thirty classes first appeared in the rock record. In a more recent paper using a slightly different dating scheme, Douglas Erwin and colleagues similarly show that thirteen new phyla appear in a roughly 6-million-year window. (p. 73)

[…][T]ake a look first at the following figure that Bowring and his colleagues included in their definitive 1993 article, published in the journal Science. They use radiometric methods to date the different stages of the Cambrian period, including the crucial Tommotian and Atdabanian stages in which the greatest number of new animal phyla and classes arise. Note that the so-called Manykaian stage of the Cambrian period lasts about 10-14 million years. Note also that the main pulse of morphological innovation didn’t begin during this stage but rather during the Tommotian and Atdabanian — a period that they describe as taking between “5 to 10 million years,” and in a more detailed passage as taking about 5-6 million years.

[…]In the figure above, the Tommotian and Atdabanian stages of the Cambrian period together span only about 5 million years, starting at about 530 and ending about 525 million years ago. Bowring’s figure also depicts the total number of classes and orders present at any given time during the Cambrian period. The biggest increases in morphological innovation occur during the Tommotian and Atdabanian stages. Indeed, during this period the number of known orders nearly quadruples. Moreover, Bowring and his colleagues also make clear that this period corresponds to the main pulse of Cambrian morphological innovation as measured by the number of new phyla and classes that first appear. They note that, while a few groups of animals do arise in the earliest Manykaian stage of the Cambrian, the most rapid period of “exponential increase of diversification,” corresponding to the Tommotian and Atdabanian stages, “lasted only 5 to 6 m.y.”

You can see the figure they are reference in the Evolution News article.

Also, check out these clips that explain the Cambrian explosion:

Part 1:

Part 2:

The first clip features James Valentine, a professor of biology at the University of California who just co-authored a new book on the Cambrian explosion and is not a proponent of intelligent design.

The consensus among scientists regarding the period of time in which the new body plans appear is 5-6 million years. Biologically speaking, that’s a blink of an eye. You aren’t going that kind of complexity and innovation in such a short period of time any more than you can expect to win the lottery by buying 5-6 million tickets when the odds of winning are 1 in a googol (10 to the 100th power – 1, followed by 100 zeroes). You don’t have enough lottery tickets to make winning the lottery likely. Similarly, 5-6 million years is not enough time for naturalistic mechanisms to code brand new body plans from scratch. It would be like trying to research and write a Ph.D thesis during a single lunch hour. It’s just not enough time to produce the amount of information that’s required.

Study: brain of child neglected by mother is smaller and underdeveloped

Dina sent me this article from the UK Daily Mail. In the past, I’ve written about how much children need their fathers, but this time I’m focusing on how much children need their mothers, especially in the first 5 years of development.

Here is two brain scans to compare:

Brain scans of 3-year old children: normal vs neglected
Brain scans of 3-year old children: normal vs neglected

Excerpt:

Both of these images are brain scans of a two three-year-old children, but the brain on the left is considerably larger, has fewer spots and less dark areas, compared to the one on the right.

According to neurologists this sizeable difference has one primary cause – the way each child was treated by their mothers.

The child with the larger and more fully developed brain was looked after by its mother – she was constantly responsive to her baby, reported The Sunday Telegraph.

But the child with the shrunken brain was the victim of severe neglect and abuse.

According to research reported by the newspaper, the brain on the right worryingly lacks some of the most fundamental areas present in the image on the left.

The consequences of these deficits are pronounced – the child on the left with the larger brain will be more intelligent and more likely to develop the social ability to empathise with others.

But in contrast, the child with the shrunken brain will be more likely to become addicted to drugs and involved in violent crimes, much more likely to be unemployed and to be dependent on state benefits.

The child is also more likely to develop mental and other serious health problems.

Professor Allan Schore, of UCLA, told The Sunday Telegraph that if a baby is not treated properly in the first two years of life, it can have a fundamental impact on development.

He pointed out that the genes for several aspects of brain function, including intelligence, cannot function.

[…]The study correlates with research released earlier this year that found that children who are given love and affection from their mothers early in life are smarter with a better ability to learn.

The study by child psychiatrists and neuroscientists at Washington University School of Medicine in St. Louis, found school-aged children whose mothers nurtured them early in life have brains with a larger hippocampus, a key structure important to learning, memory and response to stress.

The research was the first to show that changes in this critical region of children’s brain anatomy are linked to a mother’s nurturing, Neurosciencenews.com reports.

The research is published online in the Proceedings of the National Academy of Sciences Early Edition.

Lead author Joan L. Luby, MD, professor of child psychiatry, said the study reinforces how important nurturing parents are to a child’s development.

My friend Katy tweeted this article from far-left NPR:

Parents do a lot more than make sure a child has food and shelter, researchers say. They play a critical role in brain development.

More than a decade of research on children raised in institutions shows that “neglect is awful for the brain,” says Charles Nelson, a professor of pediatrics at Harvard Medical School and Boston Children’s Hospital. Without someone who is a reliable source of attention, affection and stimulation, he says, “the wiring of the brain goes awry.” The result can be long-term mental and emotional problems.

The article goes on to talk about children who grow up without mothers in Romanian orphanages:

As the children grew older, the researchers were able to use MRI to study the anatomy of their brains. And once again, the results were troubling. “We found a dramatic reduction in what’s referred to as gray matter and in white matter,” Nelson says. “In other words, their brains were actually physically smaller.”

The scientists realized the cause wasn’t anything as simple as malnutrition. It was a different kind of deprivation — the lack of a parent, or someone who acted like a parent.

A baby “comes into the world expecting someone to take care of them and invest in them,” Nelson says. “And then they form this bond or this relationship with this caregiver.” But for many Romanian orphans, there wasn’t even a person to take them out of the crib.

“Now what happens is that you’re staring at a white ceiling, or no one is talking to you, or no one is soothing you when you get upset,” Nelson says. So areas of the brain involved in vision and language and emotion don’t get wired correctly.

I expect the woman I marry (if I marry) to have a college degree, and preferably a graduate degree, and a couple of years of employment. But I think to be fair to the research on child development, she has to stay home and invest in those children through the first five years at least. After that she can stay home or work as much as she thinks is beneficial to the family goals of impacting the university, the church and the public square – as well as continuing to raise those children.  I would take over more of the parenting as the children’s needs changed. When it comes to children, we work backward from their needs, and those needs create responsibilities and obligations on the grown-ups. That doesn’t mean the children are spoiled – it means that they get what they need.

Christian parents have to go even further

Here is a relevant post from Lindsay, a Christian mother who has a graduate degree in biology and was teaching biology before leaving her career to care for her children.

She writes:

Now, can a woman handle the logistics of the home, ensure her family is cared for, and still work outside the home? Perhaps, in some cases – especially if they do not yet have children. But no woman is Superwoman. We all have limitations. It’s just not possible for any woman to adequately care for children and home while holding down a full time job. The care of children and the home is primarily a woman’s responsibility in a way it isn’t for her husband. If there are no children, it may be possible for her to care for the home and her husband and still keep a job outside the home, but she must keep the home and her husband as her priority.

Once children arrive, it becomes pretty much impossible for her to work outside the home and still fulfill her duties at home. The funny thing about children is that they need constant care. One cannot care for children and work outside the home too. The choice once children come along is whether to outsource the care of the children to someone else or to do it yourself. I firmly believe that God entrusts children to a husband and wife because he wants them to be the primary influences in their children’s lives. That doesn’t happen if the children spend a majority of their waking hours in the care of someone else.

Children don’t just need food and shelter provided to them, they need love, teaching, discipline, a sense of security, and examples of how they are to live. All of those things are best done when the child spends time primarily with his or her parents. Daycare workers, school teachers, and even grandparents simply cannot provide them in the same way parents can. No one loves a child like his own parents do. No one has such a vested interest in ensuring that he grows up with the proper spiritual and moral training. Even if others care about the child, the responsibility for the training of a child belongs to his parents. Daycare workers and teachers and grandparents won’t answer to God for the soul of that child. His parents will.

For Christian parents, the stakes are even higher. Not only do they have to care about basic needs of child, but the higher spiritual needs as well. Men really need to be careful to pick a mother for their child who has demonstrated ability in caring for the needs of others, letting the needs of others override her own selfish desires.

If you’re going to be a Christian, you need to be as smart as you can be

C.S. Lewis has some words to live by for you
C.S. Lewis has some words to live by for you

I guess I will start this post by linking to something a friend of mine named Joel Furches wrote about an atheist engineer. (link is dead)

He writes:

As an Aerospace Engineer for the U.S. Navy, Jason Pratt is not inaccurate when he describes himself as a rocket scientist for the government. He has flown F-14 Tomcats and the F/A-18F Super Hornet. He was a test pilot of the FA-18B and D Hornet, the FA-18F Super Hornet, and the T-45 Goshawk. His pedigree with all things aeronautical is well established. As was his atheism.

Pratt grew up in a single parent home. He and his sister were raised by their mother, who felt it was her duty to introduce them to church in their teenage years. The church Pratt attended was a religious shell: a ritualistic facade with little reference to actual scriptural teachings. He went through the ceremonial steps as a matter of form, and the moment he was confirmed by the church, he confirmed himself an atheist, and left the church in his dust. His family took this with barely a nod, and as soon as she was confirmed, his sister followed his example.

After High School, Pratt entered college to study engineering. Academically, he proved himself quite brilliant, and flaunted that brilliance at every opportunity. He describes himself as very much a “self-righteous atheist” in college.

He found his atheism very freeing, morally, living by the code of “do whatever you want as long as nobody gets hurt.”

Says Pratt:

“I started to meet other students, and some of them were claiming to be Christians. I even had some of them as roommates. Having had some church background, I knew the type. They were hypocrites, deluded by the silly book that they claimed they believed in. And so I frequently took pleasure in ridiculing them. I would mock them. I would look for any reason to bring out things that they would claim they believe and I would just make fun of them, and mock their God and the Bible that supposedly guided them.

“I generally enjoyed playing the intellectual superior, and I enjoyed challenging what they believed.”

Not much surprise to Pratt, most of the Christians he met had no ability to defend their faith against his ridicule.

[…]One day, however, Pratt met a fellow engineering student named John Thatcher. Thatcher had a perfect GPA, which was somewhat intimidating to someone like Pratt, who took such pride in his own intellect. Thatcher was a very likable guy. He was also a Christian. This made things difficult for Pratt.

At the same time, Pratt discovered that his Academic Adviser – a leading authority in the field of Thermodynamics – was a Christian. This discovery was made when Pratt went to his adviser’s office one day in order to request some help from the brilliant man. As Pratt approached his office, he was shocked to find a scientific article, arguing Thermodynamics from a Christian perspective, hanging from his office door. Pratt was so infuriated, he stormed away and never spoke to his adviser again.

Confused and upset that these two very intelligent men would believe in superstitious nonsense, Pratt made it his goal to truly examine the claims of Christianity for the first time.

This reminded me of a quote from atheist philosopher Thomas Nagel.

He says this:

“In speaking of the fear of religion, I don’t mean to refer to the entirely reasonable hostility toward certain established religions and religious institutions, in virtue of their objectionable moral doctrines, social policies, and political influence. Nor am I referring to the association of many religious beliefs with superstition and the acceptance of evident empirical falsehoods. I am talking about something much deeper–namely, the fear of religion itself. I speak from experience, being strongly subject to this fear myself: I want atheism to be true and am made uneasy by the fact that some of the most intelligent and well-informed people I know are religious believers.

I want atheism to be true and am made uneasy by the fact that some of the most intelligent and well-informed people I know are religious believers. It isn’t just that I don’t believe in God and, naturally, hope that I’m right in my belief. It’s that I hope there is no God! I don’t want there to be a God; I don’t want the universe to be like that.”

(”The Last Word” by Thomas Nagel, Oxford University Press: 1997)

I think in general, it’s a good thing when Christians strive to be different from the culture around them. Obviously, that means having different moral values and different goals than what’s popular and acceptable for non-Christians. It means not openly engaging in activities that are forbidden to Christians, like not getting drunk, not having premarital/extra-marital sex, etc. And I think it also means being as smart as you can possibly be about about areas that touch on your Christian worldview. Why? Because like the story above says, being informed and having the answers is attractive to people who are searching.

It doesn’t help God for you to be wild and stupid

In my life, I have sometimes tried to lead other Christians to study harder things and to get better jobs. Most of the time, this works. I can get young Christians to not study English or Drama or Art History, and instead get them to study Engineering or Computer Science or Nursing. And if they already are studying hard things, then I encourage them, I buy them books, I play games with them and ask them how things are going. Once they have the degrees, I encourage them to get jobs, to work in the summers, to open investment accounts, and pay off their loans.

The point is this – what you study and what you do for work and how good you are at your job plays a massive role in whether you will get into conversations with non-Christians at all. It is not good service to God to bungle your education and career because you were more interested in feeling good, having fun and seeking thrills. You will lose opportunities to make a difference in the lives of others that way.

Managing your money – paying off debts and investing early and often – is part of that signal of maturity that you send to others. And don’t underestimate the importance of marriage and children – something I don’t have. If I had a successful marriage, and lots of well-behaved children, that would help a lot as well. Especially if people could come over to a warm and happy home. It sends a message. However, if you’re going to stay single, then keep your self-control and be content with it. That sends a message, too.

Life is short. Don’t do what feels good. Do what works.