Hang tough, P.Z.

August 24, 2010 • 6:36 am

As most of you know, P. Z., the godfather of science bloggers, goes under the knife today.  Things are so dire that his wife is sending him pictures of cute puppies!  That won’t do, since we know that what really helps with heart problems are intercessory kittehs.

Get well, old man.

_______

Update:  P.Z., we’re thINKing of you:

(cartoon from Offthemark.com)


Peregrine Tuesday

August 24, 2010 • 4:58 am

Among raptors, the peregrine is not large. It’s about the size of a large crow, and weighs between 1 and 3 pounds (females are larger).  It’s found on every continent but Antarctica.  With its keen vision and terrible talons, it’s superbly adapted for hunting in the air.  As J. A. Baker describes in The Peregrine:

The eyes of a falcon peregrine weigh approximately one ounce each; they are larger and heavier than human eyes.  If our eyes were in the same proportion to our bodies as the peregrine’s are to his, a twelve stone man would have eyes three inches across, weighing four pounds. The whole retina of a hawk’s eye records a resolution of distant objects that is twice as acute as that of the human retina.

Raptor feet.  “c” is the peregrine; can you guess the others? (UPDATE: I’ve posted the answer in the thread for comment #6.)

As far as we know, and judging simply by its clocked movement through the medium, the peregrine is the world’s fastest animal.  It regularly attains speeds above 150 mph (241 kph) during the stoop, the controlled vertical dive it uses to strike prey from above.   Here are two videos in which people try to measure its dive speed.  In the first, “Frightful” is clocked at 183 mph (295 kph); a later dive recorded 242 mph (389 kph).

And here’s a video of Lady diving at 180 mph (290 kph).

The tide was rising in the estuary; sleeping waders crowded the saltings; plover were restless.  I expected the hawk to drop from the sky, but he came low from inland. He was a skimming black crescent, cutting across the saltings, sending up a cloud of dunlin dense as a swarm of bees. He drove up between them, black shark in shoals of silver fish, threshing and plunging.  With a sudden stab down he was clear of the swirl and was chasing a solitary dunlin up into the sky.  The dunlin seemed to come slowly back to the hawk.  It passed into his dark outline, and did not re-appear.  There was no brutality, no violence. The hawk’s foot reached out, and gripped, and squeezed, and quenched the dunlin’s heart as effortlessly as a man’s finger extinguishing an insect.  Languidly, easily, the hawk glided down to an elm on the island to plume and eat his prey.

J. A. Baker, The Peregrine

FalconCam

August 23, 2010 • 1:46 pm

A quick update: Chicago’s Field Museum, in collaboration with Midwest Generation, has set up a FalconCam on the roof of a power plant in Waukegan, Illinois.  It monitors a large peregrine nestbox, live, 24 hours a day.

I believe there are chicks in there (go to the “archive: last 24 hours”), but you can certainly see mom (Fran) and her mate.  Hurry–Fran’s there now!

UPDATE:  Chicks are gone, but mom hangs around.

Peregrine week!

August 23, 2010 • 6:49 am

The Peregrine, by John A. Baker, may not be the best nature book I’ve ever read, but I can’t think of a better one. And it’s certainly the most beautiful.   The book is not very well known—I came across it in an online review (another is here)—and the author is nearly completely obscure.  We’re not even sure when he died (one report gives 1987), although he was born in 1926.  The book, a short 190 pages, recounts a six-month period, from October to early April, when Baker tramped the fields of Essex near his home, searching for the peregrine falcon (Falco peregrinus).  At the time, the species was severely endangered, for the use of DDT, working its way through the food chain, was damaging the bird’s reproduction.

The book, in its beauty, has the air of an elegy, not just for the falcon, but for humanity in general and perhaps for the author himself:  some say that he went on his falcon quest soon after being diagnosed with a fatal illness.  And the book is hypnotic: day after day Baker goes searching for falcons, usually finding them.  They become sufficiently accustomed to his presence that he can often approach quite closely, and they even follow him on his peregrinations—the bird and the verb have the same Latin root, meaning “to journey”—hoping he’ll flush some prey.

And that’s the plot: man goes out, man watches falcon and other birds, man goes home. You’d think that this narrative, continued over nearly 200 pages, would be boring. It’s not, for it’s sustained by the gorgeous prose and Baker’s unique way of seeing.  If you buy this book, though—and I STRONGLY recommend that you do—don’t read it in one gulp.  That would be like eating five desserts in a row.  I allotted myself twenty pages per night.

Every day this week I’ll be featuring a video of the peregrine and an excerpt from the book. Today’s video uses a tiny camera mounted on the falcon to show its amazing speed and agility, which serve it well as an aerial predator specializing on birds on the wing.  A bonus is a clip of a goshawk threading its way at high speed through a woodland:

The jays were silent.  One flew heavily up, carrying an acorn in its wide-open bill.  Leaving the cover of the trees, it rose high above the meadows, making for the hillside wood four hundred yards away.  I could see the big acorn bulging its mandibles apart, like a lemon stuffed in the mouth of a boar’s head.  There was a sibilant purring sound, like the distant drumming of a snipe.  Something blurred and hissed behind the jay, which seemed suddenly to trip and stumble on the air.  The acorn spurted out of its bill, like the cork out of a bottle.  The jay fell all lopsidedly and threshing, as though it were having a fit.  The ground killed it.  The peregrine swooped, and carried the dead bird to an oak.  There he plucked and ate it, gulping the flesh hastily down, till only the wings, breast-bone, and tail were left.

Gluttonous, hoarding jay; he should have hedge-hopped and lurched from tree to tree in his usual furtive manner. He should never have bared the white flashes of his wings and rump to the watching sky. He was too vivid a mark, as he dazzled slowly across the green water-meadows.

Who cares if God exists?

August 23, 2010 • 6:08 am

Michael Graziano, a neuroscientist at Princeton University and avowed atheist, has written a strange piece at the Templeton Big Questions website, “Why we see spirits and souls.”  He makes three claims.  First, just  because science can explain something—like religious belief or consciousness—as a byproduct of the brain, this doesn’t mean that thing isn’t real. (You can see where he’s going with this.)  But few of us deny that the phenomenon of consciousness exists (after all, we do experience pain and other qualia); the problem has been to explain where it comes from and how it may have evolved.

But after arguing that ephenomena are still phenomena, he then backtracks and says that we can’t distinguish between perception and reality, and that anyway it doesn’t matter:

One of the strangest insights to emerge from neuroscience is the distinction between perception and reality. We experience our perceptions, not reality. Ever since the cortical physiology of color was first explored in the 1960s by David Hubel and Torsten Wiesel, physiologists have understood that color does not exist in any absolute sense.

Whenever I hear this kind of sly denigration of our ability to apprehend an external reality (an ability that evolution of course would have favored), I’m reminded of this limerick:

There was a faith-healer of Deal

Who said, ‘Although pain isn’t real,

If I sit on a pin

And it punctures my skin

I dislike what I fancy I feel.’

When a rabbit perceives the approach of wavelengths corresponding to the morphology of a “fox,” he’d better flee, for he wouldn’t care for what he’d perceive as the consequences of staying.

But Graziano’s main point is that even though our brain can conceive of a God, and science might explain this away as an epiphenomenon rather than a real deity outside of ourselves, this doesn’t really matter:

Much of the modern clash between science and religion focuses on questions about whether God exists independently or is a construct of the brain and whether the soul lives on after the body or ends when the brain dies. Are these crucial religious questions? I would argue that they are not. For the vast majority of people, religion is a way of life. It is about community and music, place and food, comfort and emotional support. It is, like all of human culture and experience, a function of our peculiar neurobiology, and we should try to appreciate it as such.

To deny that God’s existence is a question of consequence is a unique strategy in the annals of accommodationism.  And, as is so often the case,  the words of Orwell apply:  “One has to belong to the intelligentsia to believe things like that: no ordinary man could be such a fool.”  Maybe Graziano appreciates the potted plants, stained glass windows, and evensong of the church, but how many people would still be religious if they knew absolutely that God did not exist?  If Graziano thinks that religion for everyone is simply is a supportive community and not a set of beliefs about what exists, he needs to get out of the lab more.

Are we phalluses?

August 22, 2010 • 7:15 am

I finally got a chance to watch Phil Plait’s “Don’t be a dick” speech from The Amazing Meeting #8, which he’s put online at Bad Astronomy.  Plait has a further post in which he links to the diverse reactions to the talk that appeared in the blogosphere, and a final post in which he reiterates all the support he got for his talk.

As you may know, Plait’s theme was one of civility.  He argues that skeptics and atheists must be respectful and civil if they want to win others to their cause.  But he finds that politeness on the wane. “In some specific places,” he claims, “the tone of what we’re doing is decaying, and instead of relying on the merits of the arguments, which is what critical thinking is really all about, what evidence based reasoning is all about— it seems that vitriol and venom are on the rise.”

In the talk, Plait says that all too often skeptics behave like this:

When you’re dealing with someone who disagrees with you on some matter, what is your goal? What is your goal? What are you trying to accomplish?  Insulting them, yelling at them, calling them brain damaged or morons or baby rapers, may make you feel good. . . but is your goal to score a cheap point, or is your goal to win the damn game?

I must say that when I heard that, it immediately reminded me of this:

Many of my colleagues are fans of Dawkins, PZ, and their ilk and make a point AT CONSERVATION EVENTS to mock the religious to their face, shout forced laughter at them, and call them “stupid,” “ignorant” and the like – and these are events hosted by religious moderates where we’ve been ASKED to attend. They think it’s the way to be a good scientist, after all.

So what do you think happens when you spit in someone’s face, mock them openly, figuratively throw them to the ground and kick dirt in their face – and then ask “now we really need your help!!”? When my colleagues do this, you can watch the attention visibly disappear from the crowd when you finally start talking about conservation and real science.

That, of course, is the famous “Exhibit A”, written by the pseudonymous “Tom Johnson” and posted by Chris Mooney at The Intersection. The incident described by “Johnson” turned out to be fiction.

What struck me most strongly about the DBAD talk, and reminded me of the Tom Johnson affair, was Plait’s complete failure to provide evidence for what he was saying.   Not only did he not give a single instance of the rudeness and stridency that he finds so ubiquitous, but also gave no evidence that skeptics who behave that way have been less effective than others.  This was curious because, after all, the prime requirement for good skepticism is that you give evidence for what you think, and demand it from others.

Plait says that he deliberately refrained from giving evidence; indeed, he almost seems to claim that this lacuna was a virtue:

(From the talk): What I see is that hubris is running rampant, and that egos are just out of check and sometimes logic in those situations is left by the wayside.  I could go into specifics, but I’m not going to—you can find these for yourself: you know where to look.

(From his post): The author of this one says I don’t give specific examples, and therefore because he hasn’t seen the insults they don’t exist… and then accuses me of a strawman argument! I find that funny; finding examples about which I was speaking is trivially easy.

(From another of his posts): And one last point: a lot of folks were speculating that in my talk I was targeting specific people such as PZ Myers, Richard Dawkins, even Randi himself. I wasn’t. I was thinking fairly generically when I wrote the talk, and though I did have some specific examples of dickery in mind, the talk itself was not aimed at any individual person.

Now if examples of this behavior are “trivially easy” to find, why didn’t he give any? It seems to me that if you’re giving a talk about how bad behavior is wrecking the cause of skepticism, the first thing you need to do is give examples of that behavior.  That’s simply good argument.

There are several possibilities for why Plait didn’t.  The first is that the examples don’t exist. I don’t think this accounts for his failure to give any.  He surely has instances of “bad behavior” in mind—indeed, he says so.  And yes, you can find them in the comments section of several atheist websites.  But I find the claim of pervasive bad behavior unconvincing. If you look at the major voices of the skeptical movement, at least those that I read regularly, I think you’ll see very, very few cases of opponents being called “brain damaged” or “baby rapers”.  In general, the discourse is not about name-calling, but about facts and rational argument.  Even P. Z. Myers, who of course immediately came to most people’s minds when hearing Plait’s talk, gives arguments for his views, arguments that take up much more space than his occasional epithet.  True, many people found the “cracker-crushing” episode offensive, but P.Z. was not doing it just to tick people off.  People seem to have forgotten that he was using the episode to make a strong point about religiously-based persecution.  And that is one episode out of literally thousands of posts by atheists that deal not with impaling crackers, but giving rational arguments.

I think Plait’s argument, like that of “Tom Johnson,” attacks something of a straw man. You can certainly pick out some examples of unwise invective on the part of skeptics, but is the overall tone really that degrading? What percentage of all of our arguments are characterized by calling people baby rapers or brain dead? And where are the data saying that even that sort of invective has led to big setbacks for the movement? There are none, of course, so that arguments of this type are purely subjective impressions.  There are no supporting data.

Now Plait does have a point.  Clearly you’re not going to win friends by, say, talking about evolution in a church while at the same time calling your audience a bunch of superstitious morons.  There is a time and a place for strong language, sarcasm, and insult.  But really, how often do we do that in public, and in places where such behavior would obviously turn people off? If it were that frequent, Tom Johnson wouldn’t have had to make up stories!

Another explanation for Plait’s failure to document his claims is that by doing so he’d have to name prominent skeptics or atheists. (P. Z. again comes to mind.)  And he wouldn’t want to do that because it would anger some of his friends or allies.  I think this is the correct explanation, though of course only Plait knows for sure.  But if this is the case, I give him no kudos.  Atheists and skeptics shouldn’t give their friends a pass if their behavior is part of a trend that is supposedly so counterproductive.  I am a big fan of the National Center for Science Education and its fight to rid our schools of creationism, but I don’t hesitate to call them out for accommodationism.

To take only the latest instance of public behavior by someone often called uncivil, shrill, and impolite, have a look at Richard Dawkins’s television show on faith-based schools in the UK that is posted just below.  I defy anyone to find his arguments anything other than rational and calm, and his behavior toward his religious interlocutors anything other than polite and respectful, even as he opposes everything they stand for.

Plait is a terrific advocate of science and a great public speaker.  His speech was all warm and fuzzy—who could object to it?—and, as he notes, got a lot of support, even making some people cry with relief and gratitude.  But I don’t find it terribly convincing, and certainly not a reason for us “strident” skeptics to change our behavior.  To do that we’d need not just assertions, but evidence.  In its absence, let all of us do what we can, remembering, as we nearly always do, to adjust our tone to our audience.

Dawkins program on UK faith schools

August 22, 2010 • 5:14 am

For your Sunday morning viewing, I give you “Faith School Menace,”  a 45-minute documentary narrated by and featuring Richard Dawkins that just aired on Channel 4 in the UK.  It’s about the egregious British institution of government-supported faith-based schools, which now comprise 1/3 of “public” (in the U.S. sense) primary schools.  It’s really good investigatory journalism, well worth watching—especially for those who argue that Dawkins’s shrillness and stridency render him ineffectual. (More on that later today.)

There are four parts; here’s the first, with the links to the rest below. (If you watch the first video, you’ll be automatically taken, in succession, to the others.)  If you’re in the UK, you can find a link in comment #1 below.

Part 2

Part 3

Part 4

Stenger on evolution and accommodationism

August 21, 2010 • 8:27 am

It seems as if Huffington Post isn’t too keen on Victor Stenger’s pieces, either burying them or relegating them to sidebars—all the while giving big play, on the “Religion” page, to the likes of Karl Giberson and a motley assortment of rabbis, nuns, and other believers.  Could this be because Stenger’s an atheist?

In his latest column, “Ignoring scientific errors”, Stenger tries to make sense of disparate results when people were polled about their acceptance of evolution.  In an Angus Reid poll,  when Americans were asked whether they thought humans had evolved from less advanced species or had been created in their present form within the last 10,000 years, the answers came out 35% for evolution, 47% for creation, and 18% unsure.

This conflicted with the numbers from a Gallup poll:

NCSE [the National Center for Science Education] compared these results with a series of Gallup polls from 1982 to 2008 that asked respondents to chose from three options: (1) Humans developed over millions of years, God-guided; (2) Humans developed over millions of years, God had no part; (3) God created humans as is within 10,000 years. The results were fairly consistent over the years, the 2008 results giving 36% for God-guided but over millions of years, 14% for the long period with God having no part, and 44% with creation as is within last ten thousand years.

NCSE concluded that 50% of Americans therefore accept evolution.

Stenger has a different take:

While it is true that there were people before Darwin, including his own grandfather, who had speculated about evolution, today the term is understood to include the Darwin-Wallace mechanism of random mutations and natural selection. There is no crying in baseball, and there is no guidance, God or otherwise, in Darwinian evolution. Only the 14% who accept that God had no part in the process can be said to believe in the theory of evolution as the vast majority of biologists and other scientists understands it today. God-guided development is possible, but it is unnecessary and just another form of intelligent design.

How does this jibe with the Angus Reid result? Notice that their poll did not specifically ask about God guidance. I am sure that a good part of the 35% of Americans who said they supported evolution would have given a different answer if they had been asked about unguided evolution. So Gallup’s 14% supporting evolution, not NCSE’s 50%, seems more likely.

Stenger faults the NCSE for deliberately misrepresenting the data, casting it in the best possible light to argue that lots of Americans really do accept evolution:

But we scientists can at least challenge false or misleading claims made by religion instead of disingenuously sweeping them under the rug. NCSE should have commented on the fact that the 36% of Americans who believe in God-guided “evolution” evidently do not understand the role of random variation and selection pressure in the actual theory of evolution, and therefore do not accept the mechanism of evolution as scientists understand it. It is not being rude or polemical to correct a public misunderstanding of a scientific theory. It is not doing your duty as tax-exempt educational organization to ignore such misrepresentations for political gain.

I’ve argued this point before, and agree with Stenger.  Those who think that evolution is guided by God, either directly or as a rigged game in which certain goals were built into the process from the outset, don’t accept evolution as it’s understood by modern science.  This also goes (as Stenger argues) for the Catholic church, which believes that evolution is basically okay with the exception of humans, who were inculcated with a soul at some point after our divergence from other great apes.  Ditto for those who agree with scientists like Kenneth Miller and Simon Conway Morris that humans were an inevitable, God-produced goal of the evolutionary process.

These people are not evolutionists in the sense that working biologists are evolutionists.  They are evolutionary creationists, for they accept that God had a hand in guiding evolution.  Indeed, Darrell Falk, president of BioLogos and accommodationist par excellence, proudly wears the label of “evolutionary creationist” when consorting with fellow Christians.

In the interests of political expediency, the NCSE and other accommodationists abandon the bedrock principle of modern science: naturalism.  As Stenger argues, by counting evolutionary creationists as evolutionists, and playing down the important disparity between their beliefs and those of real scientists, accommodationists  are simply manipulating the facts for political gain.  But the gain is illusory.