Bones, Rocks and Stars

How do we know how old things are? That’s a straightforward and very scientific question, and exactly the kind of thing students ought to ask; it’s also the kind of question that has been muddled up by lots of bad information (blame the creationists), and can be difficult for a teacher to answer. There are a great many dating methods, and you may need to be a specialist to understand many of them…and heck, I’m a biologist, not a geologist or physicist. I’ve sort of vaguely understood the principles of measuring isotope ratios, but try to pin me down on all the details and I’d have to scurry off and dig through a pile of books.

I understand it better now, though. I’ve been reading Bones, Rocks and Stars : The Science of When Things Happened(amzn/b&n/abe/pwll) by Chris Turney.

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Uninvention

Our Seed Overlords have asked a question (our answering is entirely voluntary, if you were wondering, and we’re only answering because it is an interesting question): “if you could cause one invention from the last hundred years never to have been made at all, which would it be, and why?

Several of my colleagues here have coughed up answers—Adventures in Ethics and Science (with a particularly appropriate entry),

Afarensis,

Evolgen,

Living the Scientific Life, and

Stranger Fruit—but I’m going to be a little bit contrary and question the question.

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My kind of guy

I’m going to have to get this book, Sex, Drugs, and DNA (amzn/b&n/abe/pwll)
just on the basis of a few excerpts…

Unfortunately, the US is a nation of very stupid people. So I
have stripped out the jargon and tried to deal with science
and health issues as though I was haranguing you at a party.

…and…

The strange thing about talking to non-scientists about science is that you quickly notice that some of the smartest,
most thoughtful and intellectually curious people have a terrible understanding of it. Most students leave high school
poorly equipped to manipulate even the most basic concepts. Nonetheless, I remain hopeful that we can increase
science literacy and intelligent discourse in the US. What can
I say? I’m an optimist.

…and a nice cartoon…

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Evo-Devo in NYR Books!

This really is an excellent review of three books in the field of evo-devo

From DNA to Diversity: Molecular Genetics and the Evolution of Animal Design (amzn/b&n/abe/pwll),

Endless Forms Most Beautiful: The New Science of Evo Devo and the Making of the Animal Kingdom (amzn/b&n/abe/pwll), and

The Plausibility of Life:Resolving Darwin’s Dilemma (amzn/b&n/abe/pwll)—all highly recommended by me and the NY Times. The nice thing about this review, too, is that it gives a short summary of the field and its growing importance.

Summer reading

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Who would have thought these words would ever be typed by me? I’m looking forward to Ann Coulter’s new book.

It’s called Godless(amzn/b&n/abe/pwll). Apparently, Ann Coulter has written a book about me, although I suspect that she’ll instead be pretending that people like me are representative of the Democratic Party as a whole. I wish.

I’m sure it will be insightful, nuanced, and meticulously researched. Maybe Al Franken and I should get together in a summer book club to discuss it.

We should invade their countries, kill their leaders and convert them to Christianity.

Ann Coulter

P.S. Please don’t buy it. I’m not planning to, myself (although if the publisher wants to send me a review copy, I’ll gleefully read it and review it), but I just know my local library will be getting it.

P.P.S. I’m also amused at the image of Ann Coulter as an icon of Christian thought.

gen•e•sis

Some fields of science are so wide open, such virgin swamps of unexplored territory, that it takes some radically divergent approaches to make any headway. There will always be opinionated, strong-minded investigators who charge in deeply and narrowly, committed to their pet theories, and there will also be others who consolidate information and try to synthesize the variety of approaches taken. There are dead ends and areas of solid progress, and there is much flailing about until the promising leads are discovered.

Origins of life research is such an unsettled frontier. I wouldn’t want to work there, but the uncertainty and the confusion and the various small victories and the romance of the work do make for a very good story. And now you can read that story in Robert Hazen’s Gen•e•sis: The Scientific Quest for Life’s Origins (amzn/b&n/abe/pwll).

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A request!

Here’s a really good question from Katrina Refugee:

Due to the unforeseen events of Katrina, my family and I ended up staying with relatives in South Carolina, and my children (for the year) are going to a small Christian school with their cousins (the public schools in this area are quite horrendous and we were trying to ease the transition as best as possible). They will be back in public school next year, but in the meantime have been exposed to some really silly creationist crap in the science classroom.

Can you recommend some reading material for the summer to “wash away” all the stuff they have been exposed to this year? We have diligently discussed all the fallacies of what they are being taught, but I am not a scientist and I would feel much better if they had some appropriate books to read over the summer.

They are aged 15 and 14.

This is a serious request, and I would greatly appreciate any advice you may have.

I’ve put a few ideas below the fold.

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Give me creaturely over preacherly any day

You can tell when a dogmatic theist has to review a book by an unapologetic atheist: there’s a lot of indignant spluttering, and soon the poor fellow is looking for an excuse to dismiss the whole exercise, so that he doesn’t have to actually think about the issues. That’s the case with Leon Wieseltier’s review of Dennett’s Breaking the Spell—it’s kind of like watching a beached fish gasp and flounder, yet at the same time he apparently believes he’s the one with the gaff hook and club.

It’s full of self-important declarations that reduce to incoherence, such as this one:

You cannot disprove a belief unless you disprove its content. If you believe that you can disprove it any other way, by describing its origins or by describing its consequences, then you do not believe in reason. In this profound sense, Dennett does not believe in reason. He will be outraged to hear this, since he regards himself as a giant of rationalism. But the reason he imputes to the human creatures depicted in his book is merely a creaturely reason. Dennett’s natural history does not deny reason, it animalizes reason.

One moment he’s telling us that just tracing the origins of an idea is insufficient to disprove it (sadly for Mr Wieseltier’s argument, there is no sign that Dennett disagrees), the next he’s telling us that the origin of Dennett’s reason is “creaturely” and “animalized”, and therefore of a lesser or invalid kind. I had no idea we could categorize reason by the nature of its source (I’d like to know what varieties of reason he proposes: “creaturely”, “human”, “divine”? Is there also a “vegetable reason”?), but even if we could, by his initial premise, it wouldn’t matter: he needs to address its content, not carp against it because it is the product of natural selection rather than revelation.

Then there’s this rather bewildering build-up. Wieseltier carefully builds a case that he has caught Dennett in an internal contradiction, an idea he pounces on with a kind of petty triumphal glee…but all it shows is that he doesn’t know what he’s talking about.

Like many biological reductionists, Dennett is sure that he is not a biological reductionist. But the charge is proved as early as the fourth page of his book. Watch closely. “Like other animals,” the confused passage begins, “we have built-in desires to reproduce and to do pretty much whatever it takes to achieve this goal.” No confusion there, and no offense. It is incontrovertible that we are animals. The sentence continues: “But we also have creeds, and the ability to transcend our genetic imperatives.” A sterling observation, and the beginning of humanism. And then more, in the same fine antideterministic vein: “This fact does make us different.”

Then suddenly there is this: “But it is itself a biological fact, visible to natural science, and something that requires an explanation from natural science.” As the ancient rabbis used to say, have your ears heard what your mouth has spoken? Dennett does not see that he has taken his humanism back. Why is our independence from biology a fact of biology? And if it is a fact of biology, then we are not independent of biology. If our creeds are an expression of our animality, if they require an explanation from natural science, then we have not transcended our genetic imperatives. The human difference, in Dennett’s telling, is a difference in degree, not a difference in kind—a doctrine that may quite plausibly be called biological reductionism.

To declare that we are not limited by our genetic imperatives does not in any way contradict the statement that we are material, biological beings with behaviors that can be explained scientifically, without recourse to the supernatural or any other kind of immaterial vitalism. Opposing simplistic genetic reductionism—which, by the way, is good to see from Dennett, because he has a bit of a reputation for being far too narrowly reductionist in his views—is not the same as denying a natural, biological basis for behavior. When Wieseltier tries to insist that genetic determinism is the same as biology, he’s just flaunting his own ignorance.

The whole review reads this poorly, and I suppose I could take it on paragraph by paragraph…but nah. Brian Leiter has already torpedoed it, so even this much seems like excess. The New York Times really needs to do a better job of finding qualified reviewers—it seems in this case they just found a guy anxious to posture against the ungodly, with no competence to actually judge the book.