Basics: Gastrulation

That guy, John Wilkins, has been keeping a list of presentations of basic concepts in science, and he told me I’m supposed to do one on gastrulation. First I thought, no way—that’s way too hard, and I thought this was all supposed to be about basic stuff. But then I figured that it can’t be too hard, after all, all you readers went through it successfully, and you even managed to do it before you developed a brain. So, sure, let’s rattle this one off.

In the simplest terms, gastrulation is a stage in early development; in human beings it occurs between two and three weeks after fertilization. It is that stage when a two-layered cell mass undergoes a set of specific movements and interactions that establish the three germ layers of the embryo (endoderm, mesoderm, and ectoderm) and the beginnings of a three-dimensional structure. The end result doesn’t look like much of an animal, but it has set up pools of cells that will contribute to specific future cell types, and has laid down the rough outline of tissues along the body axis.

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The Dumbening of America continues

Somebody shoot me now. The Washington Post tallies up congressional votes, and in an astounding display of technological mastery, allows you to sort and display them by the congressperson’s astrological sign. If you’ve ever wondered whether Scorpios were more likely to vote for highway appropriations than are Virgos, now you can find out.

I really want to know what the conversations the editors or publishers had about this decision were like. I’m thinking they were getting worried about how idiotic and cowardly the press has been looking lately, so someone decided to do something bold and exciting and revolutionary…and this is what they came up with.

Don’t panic!

Quite a few people have written to me asking what’s wrong with richarddawkins.net…they can’t get through to it, and get DNS errors. No worries, everyone—it’s good news. They’ve been experiencing ever-escalating levels of traffic, so to cope with the incoming hordes, they’ve just migrated to a new and better server. Give the network a little time, you should be able to get to it in the next day or two.

Ducks with 6 limbs are not caused by genetic changes!

i-c8f107137044371032bf8a15e10c2250-4leg-duck.jpg

Cool: here’s a duck with four hindlimbs.

I have to gripe about the description, though:

A rare mutation has left eight-day-old Stumpy with two extra legs behind the two he moves around on. … The mutation is rare but cases have been recorded across the world.

No, no, no. This is almost certainly not the result of a mutation, and it’s one of my pet peeves when the media makes this wrong assumption, that every change in a newborn is the product of a genetic change. This is the result of a developmental error, not a genetic one, most likely caused by a fusion of two embryos in a single egg.

(via Apostropher)

Nathan Newman on Romney

Nathan Newman asks a good question about Mitt Romney’s rejection of the godless:

And at some level, why shouldn’t a person’s religious beliefs be relevant?

They should be. However, when one holds a minority belief about religion, one that is widely reviled, then it is to one’s interest to insist that religion be off the table. That’s a purely pragmatic concern. In addition, I think there’s an element of resentment: we atheists have been told so often to sit down and shut up and keep our opinions out of the debate, even by people who don’t believe in religion themselves, that we tend to get a little cranky when we see people of faith indulging themselves in a class of criticisms denied to us, or that trigger howls of protest when we say them.

There is also a sound principle involved. In the next election, I’ll be voting for a religious person for president—there won’t be any atheist candidates, and if there were, they wouldn’t stand a chance. I cannot demand that the candidates believe in a certain way, but I can still insist that they govern as a secular leader. That’s the best I can hope for.

But Newman is right that that doesn’t mean we need to lay low.

I think it’s a profound mistake for atheists to demand that such religious debates be taken out of the public sphere, since they will never be taken out of voters’ minds. Instead, us progressive atheists should be engaging in that faith-based discussion more vigorously, laying out our belief systems and helping make voters comfortable with our viewpoint as part of the menu of “religious” options, not in order to convert them but just to integrate it into the terrain of debate that people are more familiar with.

Otherwise, atheism will just remain the unspoken Other, which voters will inherently (and rightly) distrust because they just won’t know what it means personally to the politician involved. So I’m all for a religion in public life debate — and I’m prepared to argue for why progressive atheism leads to the kinds of public policy voters should want. But if we don’t make the case, we can’t expect Christian voters to want anything other than what they are familiar with.

I think debating in order to convert people would be a good thing to do, actually — a large voting bloc of vocal atheists would do wonders for the body politic. I think the issue is one of framing the argument in a positive way: not, don’t vote for Candidate X because she is a [Catholic/Mormon/Pagan/whatever], but do vote for Candidate Y because she is a rationalist who holds sensible secular values. Romney was playing the blind, stupid politics of exclusion rather than promoting the virtues of his ideas.

Humes on the talk-radio version of evolution

Edward Humes, the author of Monkey Girl, has an excellent op-ed in the Lawrence Journal-World.

The talk-radio version had a packed town hall up in arms at the “Why Evolution Is Stupid” lecture. In this version of the theory, scientists supposedly believe that all life is accidental, a random crash of molecules that magically produced flowers, horses and humans — a scenario as unlikely as a tornado in a junkyard assembling a 747. Humans come from monkeys in this theory, just popping into existence one day. The evidence against Darwin is overwhelming, the purveyors of talk-radio evolution rail, yet scientists embrace his ideas because they want to promote atheism.

These are just a few highlights of the awful and pervasive straw-man image of evolution that pundits harp about in books and editorials and, yes, on talk radio, and this cartoon version really is stupid. No wonder most Americans reject evolution in poll after poll.

This is really why scientists either get angry or dismiss creationism as a joke: the proponents are annoyingly ignorant of the ideas they are arguing against, so there is no reason to take them seriously. My first clue that someone is a babbling fool is when they start calling it “Darwinism”—then I know that I’m going to be wasting my time, because the first thing I have to do is clear the army of straw men out of the room, and even then, the joker probably isn’t going to pay any attention to what I have to say about evolution, because he still has that cartoon version of biology taught to him by his preacher whirling around in his head, complete with calliope music.

This is also the second time in a week I’ve heard talk radio brought up in this argument. I wonder if that’s an angle we haven’t been pushing hard enough—I know in those few instances where I’ve accidentally tuned in to some ranter on the AM side of the dial, I just go “Gaaaaa!” and turn it off. Maybe I shouldn’t do that; maybe some of us should be calling up the talk radio stations and offering to go on and discuss the non-cartoon version of evolution.

Greg Laden visited the creationist science fair so we don’t have to

As I might have guessed, it seems to have been rather unimpressive. No genuinely outré exhibits, just more average work with bible verses slapped on. He does observe that quote-mining the bible means these kiddies are going to burn in hell someday, which does add a little frisson of horror to the exhibit, but since it’s just as much an unsympathetic fantasy as the Christian belief that we godless people are hellbound, I’m afraid it’s still not enough reason to have compelled me to drive across the state to see it.