Take the Loom with you. Discover has now set up a mobile version of the entire site, including this blog. It looks good on my Itouch, I have to say, but judge for yourself. And let us know if you find any bugs in need of fixing.

Originally published October 21, 2009. Copyright 2009 Carl Zimmer.

Joshua , a conservation biologist, writes, ” This was a tattoo I got of one of the species that I did my Ph.D. on. The fish is Halichoeres hortulanus and the DNA sequence is the primer for one of the genes I used to study the fish (the mitochondrial control region).”

Click here to go to the full Science Tattoo Emporium.

Originally published October 16, 2009. Copyright 2009 Carl Zimmer.

I’ve written a few times here about the ongoing work of Joe Thornton, a biologist at the University of Oregon and the Howard Hughes Medical Institute. Thornton studies how molecules evolve over hundreds of millions of years. He does so by figuring out what the molecules were like in the distant past and recreating those ancestral forms in his lab to see how they worked. I first wrote about his work looking at how one molecule in our cells evolved from one function to another (here, here, and here). [Update: These links are now fixed.]

Most recently, I wrote in the New York Times about his latest experiment, in which he and his colleagues found that the evolution from the old function to the new one has now made it very difficult for natural selection to drive the molecule back to its old form. Its evolution has moved forward like a ratchet.

Thornton’s new work turned up last week on a web site run by the Discovery Institute, a clearinghouse for all things intelligent design (a k a the progeny of creationism). Michael Behe, a fellow at the Institute, wrote three posts (here, here, and here) about the new research, which he pronounced “great.”

This is the same Michael Behe who, when Thornton published the first half of this research, declared it “piddling.”

Why the change of heart? Because Behe thinks that the new research shows that evolution cannot produce anything more than tiny changes. And if evolution can’t do it, intelligent design can. (Don’t ask how.)

I pointed out Behe’s posts to Thornton and asked him what he thought of them. Thornton sent me back a lengthy, enlightening reply. Since the Discovery Institute doesn’t allow people to comment on their site, I asked Thornton if I could reprint his message here.

Continue reading “The Blind Locksmith Continued: An Update from Joe Thornton” →

My second podcast is now live. I talk to Dennis Bray of the University of Cambridge about cells as microscopic computers. I first came across Bray’s work while working on my book, Microcosm. I was looking for new work on how E. coli manages to figure out where to go when it doesn’t have a brain or even a single neuron. Before long, I came across Bray’s remarkable work on the sophisticated information-processing that goes on inside the bug.

In this week’s podcast I sound like I’m broadcasting out of a tin can (I’m getting that hammered out), but don’t let my distractions get in the way of listening to Bray. And if you’re interested in more details, check out his new book, Wetware: A Computer in Every Living Cell.

Originally published October 12, 2009. Copyright 2009 Carl Zimmer.

Jeff, a pharmacy student in Richmond writes,

One thing about Richmond is that most everyone in the city has a tattoo. After living here for 3 years I finally gave into peer pressure and got a tattoo. The only thing I could think of getting that I wouldn’t regret later in life was something nerdy/chemistry related, organic chemistry to be specific. While searching for inspiration I stumbled upon this story about the German chemist August Kekule who is responsible for discovering the ring structure of benzene.
Kekule claims that he stopped writing and dozed off to sleep. He saw atoms whirling and dancing before his eyes. The atoms then began to reassemble themselves into long rows that seemed to move about in a snake-like motion. As he watched the snake dance, the vision progressed until the snake formed itself into an image he had seen years before at a 1850 murder trial: the snake devouring its own tail.

So there it is…a benzene ring with an Ouroborus around it…

Click here to go to the full Science Tattoo Emporium.

Originally published October 11, 2009. Copyright 2009 Carl Zimmer.