Monthly Archives: July 2010

Clock Quotes

Matisse makes a drawing, then he makes a copy of it. He recopies it five times, ten times, always clarifying the line. He’s convinced that the last, the most stripped down, is the best, the purest, the definitive one; and in fact, most of the time, it was the first. In drawing, nothing is better than the first attempt.
– Pablo Picasso

Virtual ‘Frog Dissection’ iPad app (video)

I can see this as instructional material while dissecting a real frog, getting a feel for its texture, smell, seeing the individual differences between the way multiple frogs look on the inside, but not as a replacement of the real thing. What do you think?

Books: ‘On The Grid’ by Scott Huler

grid_cover.jpgAbout a month ago, I told you about the book-reading event where Scott Huler (blog, Twitter, SIT interview) read from his latest book On The Grid (amazon.com). I read the book immediately after, but never wrote a review of my own. My event review already contained some of my thoughts about the topic, but I feel I need to say more, if nothing else in order to use this blog to alert more people about it and to tell everyone “Read This Book”.
infrastructure 001.JPGWhat I wrote last month,

“I think of myself as a reasonably curious and informed person, and I have visited at least a couple of infrastructure plants, but almost every anecdote and every little tidbit of information were new to me. Scott’s point – that we don’t know almost anything about infrastructure – was thus proven to me.”

infrastructure 003.JPG…was reinforced when I read the book itself: I don’t know anything about infrastructure. But after reading the book I can say I know a little bit, understand how much I don’t know, and realize how much more I’d like to know. I bet it was fun watching me as I was reading it, exclaiming on average five times per page “This is so cool”, and “Hey, this is neat” and “Wow, I had no idea!” and (rarely) “w00t! Here’s a tidbit I actually heard of before” and “Hey, I know where this is!” (as I lived in Raleigh for eleven years, I know the area well).
infrastructure 006.JPGA few years ago, Scott was just as ignorant about infrastructure as most of us are. But then his curiosity got better of him and he started researching. He would start at his house in Raleigh and trace all the wires and cables and pipes going in and out of the house to see where they led. Sometimes there would be a crew on his street digging into the asphalt and fixing something and he would approach them and ask questions. At other times he would figure out where the headquarters are and who to ask to talk to:
infrastructure 007.JPG

“What Scott realized during the two years of research for the book is that people in charge of infrastructure know what they are doing. When something doesn’t work well, or the system is not as up-to-date as it could be, it is not due to incompetence or ignorance, but because there is a lack of two essential ingredients: money and political will. These two factors, in turn, become available to the engineers to build and upgrade the systems, only if people are persuaded to act. And people are persuaded to act in two ways: if it becomes too costly, or if it becomes too painful to continue with the old way of doing things. It is also easier to build brand new systems for new services than it is to replace old systems that work ‘well enough’ with more more modern ways of providing the same service.”

infrastructure 008.JPGIn a sense, this book is a memoir of curiosity as Scott describes his own adventures with a hard-hat, a modern Jean Valjean sloshing his way through the Raleigh sewers, test-driving the public transportation, and passing multiple security checks in order to enter the nearby nuclear plant.
infrastructure 009.JPGBut it is more than just a story of personal awe at modern engineering. Scott weaves in the explanations of the engineering and the underlying science, explains the history and the politics of the Raleigh infrastructure, the historical evolution of technologies underlying modern infrastructure, and illustrates it by comparisons to other infrastructures: how does New York City does that, how did Philadelphia did it 50 years ago, how did London 500 years ago, how about Rome 2000 years ago?
infrastructure 014.JPG

“What is really astonishing is how well the systems work, even in USA which has fallen way behind the rest of the developed world. We are taking it for granted that the systems always work, that water and electricity and phone and sewers and garbage collection and public transportation always work. We get angry on those rare occasions when a system temporarily fails. We are, for the most part, unprepared and untrained to provide some of the services ourselves in times of outages, or to continue with normal life and work when a service fails. And we are certainly not teaching our kids the necessary skills – I can chop up wood and start a wood stove, I can use an oil heater, I know how to slaughter and render a pig, how to get water out of a well, dig a ditch, and many other skills I learned as a child (and working around horses) – yet I am not teaching any of that to my own kids. They see it as irrelevant to the modern world and they have a point – chance they will ever need to employ such skills is negligible.”

infrastructure 015.JPGAnd this brings me to the point where I start musing about stuff that the book leaves out. As I was reading, I was constantly hungry for more. I wanted more comparisons with other cities and countries and how they solved particular problems. I wanted more history. I wanted more science. I wanted more about political angles. But then, when I finished, I realized that a book I was hungry for would be a 10-tome encyclopedic monograph and a complete flop. It is good that Scott has self-control and self-discipline as a writer to know exactly what to include and what to leave out. He provides an excellent Bibliography at the end for everyone who is interested in pursuing a particular interest further. His book’s homepage is a repository for some really cool links – just click on the infrastructure you are interested in (note that “Communications” is under construction, as it is in the real world – it is undergoing a revolution as we speak so it is hard to collect a list of ‘definitive’ resources – those are yet to be written):
OnTheGrid homepage.jpg
infrastructure 022.JPGWhat many readers will likely notice as they go through the book is that there is very little about the environmental impacts of various technologies used to ensure that cities function and citizens have all their needs met. And I think this was a good strategy. If Scott included this information, many readers and critics would focus entirely on the environmental bits (already available in so many other books, articles and blogs) and completely miss what the book is all about – the ingenuity needed to keep billions of people living in some kind of semblance of normal life and the interconnectedness that infrastructure imposes on the society, even on those who would want not to be interconnected:
infrastructure 027.JPG

“There are people who advocate for moving “off the grid” and living a self-sufficient existence. But, as Scott discovered, they are fooling themselves. Both the process of moving off the grid and the subsequent life off the grid are still heavily dependent on the grid, on various infrastructure systems that make such a move and such a life possible, at least in the developed world.”

infrastructure 031.JPGMy guess is, if there’s anyone out there who could possibly not like this book, it will be die-hard libertarians who fantasize about being self-sufficient in this over-populated, inter-connected world.
infrastructure 032.JPGAt several places in the book, Scott tries to define what infrastructure is. It is a network that provides a service to everyone. It has some kind of control center, a collection center or distribution center. It has a number of peripheral stations and nodes. And there are some kinds of channels that connect the central place to the outside stations and those stations to the final users – every household in town. There is also a lot of redundancy built into the system, e.g., if a water main breaks somewhere, you will still get your water but it will come to you via other pipes in surrounding streets, with zero interruption to your service.
infrastructure 025.JPGScott covers surveying of land, stormwater, freshwater, wastewater, roads, power, solid waste, communications (phone, broadcast media, internet) and transportation (e.g., public transportation, trains, airplanes). These are the kinds of things that are traditionally thought of as ‘infrastructure’. But aren’t there other such systems? I’d think security has the same center-spokes model of organization as well: police stations and sub-stations (distribution centers) that can send cops out wherever needed (distribution channels), with potential criminals brought to court (processing centers) and if found guilty placed in prison (collection center). Similarly with fire-departments. Ambulances are just the most peripheral tentacles of the health-care infrastructure. The local-county-state-federal political system is also a kind of infrastructure. So is the military. So is the postal system. So is the food industry and distribution.
infrastructure 018.JPGThinking about all of these other potential examples of infrastructure made me realize how many services that require complex infrastructure undergo cycles of centralization and decentralization. For transportation, everyone needed to have a horse. Later, it was centralized into ship, railroad, bus and airline infrastructures. But that was counteracted by the popularity of individually owned cars. And of course taxis were there all along. And as each decade and each country has its own slight moves towards or away from centralization, in the end a balance is struck in which both modes operate.
infrastructure 020.JPGYou raised your own chickens. Then you bought them from mega-farms. Now many, but not most citizens, are raising their own chickens again. It is not feasible – not enough square miles on the planet – for everyone to raise chickens any more. But having everyone fed factory chicken is not palatable to many, either. Thus, a new, uneasy balance.
infrastructure 011.JPGNowhere is this seen more obviously today as in Communications infrastructure. We are in the middle of a big decentralization movement, away from broadcast (radio, TV and yes, newspaper industry infrastructure with its printing presses, distribution centers and trucks) infrastructure that marked about half of 20th century, and forward into something more resembling the media ecosystem of the most of human history – everyone is both a sender and a receiver, except that instead of writing letters or assembling at a pub every evening, we can do this online. But internet is itself an infrastructure – a series of tubes network of cables and it is essential not to allow any centralized corporation to have any power over what passes through those cables and who gets to send and receive stuff this way.
infrastructure 013.JPGFinally, as I was reading the book I was often wishing to see photographs of places or drawings of the engineering systems he describes. As good as Scott is at putting it in words, there were times when I really wanted to actually see how something looks like. And there were times when what I really wanted was something even more interactive, perhaps an online visualization of an infrastructure system that allows me to change parameters (e.g., amount of rainfall per minute) and see how that effects some output (e.g., rate of clearing water off the streets, or speed at which it is rushing through the pipes, or how it affects the water level of the receiving river). That kind of stuff would make this really come to life to me.
infrastructure 030.JPGPerhaps “On The Grid” will have an iPad edition in the future in which the text of the book is just a beginning of the journey – links to other sources (e,g., solutions around the globe, historical sources), to images, videos, interactive visualizations and, why not, real games. After all, it is right here in Raleigh that IBM is designing a game that allows one to plan and build modern infrastructure – CityOne. These two should talk to each other and make something magnificent like that.
Cross-posted from Science In The Triangle.
The small images are thumbnails – click on each to see the whole picture, full-size.

Open Laboratory 2010 – submissions so far

The list is growing fast – check the submissions to date and get inspired to submit something of your own – an essay, a poem, a cartoon or original art.
The Submission form is here so you can get started. Under the fold are entries so far, as well as buttons and the bookmarklet. The instructions for submitting are here.
You can buy the last four annual collections here. You can read Prefaces and Introductions to older editions here.

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Clock Quotes

A signature always reveals a man’s character – and sometimes even his name.
– Evan Esar

Clock Quotes

To pierce the curtain of the future, to give shape and visage to mysteries still in the womb of time, is the gift of the imagination. It requires poetic sensibilities with which judges are rarely endowed and which their education does not normally develop.
– Felix Frankfurter

Clock Quotes

“Cats aren’t clean, they’re just covered with cat spit.”
– John S. Nichols

I’m a Social Media Guru (video)

On the other hand….read: Lesson From Social Media Day: I’m An Expert, Too.

New and Exciting in PLoS ONE

There are 18 new articles in PLoS ONE today. As always, you should rate the articles, post notes and comments and send trackbacks when you blog about the papers. You can now also easily place articles on various social services (CiteULike, Mendeley, Connotea, Stumbleupon, Facebook and Digg) with just one click. Here are my own picks for the week – you go and look for your own favourites:
Radiographs Reveal Exceptional Forelimb Strength in the Sabertooth Cat, Smilodon fatalis:

The sabertooth cat, Smilodon fatalis, was an enigmatic predator without a true living analog. Their elongate canine teeth were more vulnerable to fracture than those of modern felids, making it imperative for them to immobilize prey with their forelimbs when making a kill. As a result, their need for heavily muscled forelimbs likely exceeded that of modern felids and thus should be reflected in their skeletons. Previous studies on forelimb bones of S. fatalis found them to be relatively robust but did not quantify their ability to withstand loading. Using radiographs of the sabertooth cat, Smilodon fatalis, 28 extant felid species, and the larger, extinct American lion Panthera atrox, we measured cross-sectional properties of the humerus and femur to provide the first estimates of limb bone strength in bending and torsion. We found that the humeri of Smilodon were reinforced by cortical thickening to a greater degree than those observed in any living felid, or the much larger P. atrox. The femur of Smilodon also was thickened but not beyond the normal variation found in any other felid measured. Based on the cross-sectional properties of its humerus, we interpret that Smilodon was a powerful predator that differed from extant felids in its greater ability to subdue prey using the forelimbs. This enhanced forelimb strength was part of an adaptive complex driven by the need to minimize the struggles of prey in order to protect the elongate canines from fracture and position the bite for a quick kill.

Is Thermosensing Property of RNA Thermometers Unique?:

A large number of studies have been dedicated to identify the structural and sequence based features of RNA thermometers, mRNAs that regulate their translation initiation rate with temperature. It has been shown that the melting of the ribosome-binding site (RBS) plays a prominent role in this thermosensing process. However, little is known as to how widespread this melting phenomenon is as earlier studies on the subject have worked with a small sample of known RNA thermometers. We have developed a novel method of studying the melting of RNAs with temperature by computationally sampling the distribution of the RNA structures at various temperatures using the RNA folding software Vienna. In this study, we compared the thermosensing property of 100 randomly selected mRNAs and three well known thermometers – rpoH, ibpA and agsA sequences from E. coli. We also compared the rpoH sequences from 81 mesophilic proteobacteria. Although both rpoH and ibpA show a higher rate of melting at their RBS compared with the mean of non-thermometers, contrary to our expectations these higher rates are not significant. Surprisingly, we also do not find any significant differences between rpoH thermometers from other -proteobacteria and E. coli non-thermometers.

Who are you, again?

I see – DrugMonkey, Janet, Pal and Jason are reviving the annual tradition of asking readers to say in the comments who they are. I did this in 2008 bit can’t find if I did it in 2009. The original questions and instructions are:

1) Tell me about you. Who are you? Do you have a background in science? If so, what draws you here as opposed to meatier, more academic fare? And if not, what brought you here and why have you stayed? Let loose with those comments.
2) Tell someone else about this blog and in particular, try and choose someone who’s not a scientist but who you think might be interested in the type of stuff found in this blog. Ever had family members or groups of friends who’ve been giving you strange, pitying looks when you try to wax scientific on them? Send ’em here and let’s see what they say.

But my blog is different – many different topics and only a handful of posts per year really dissecting a scientific study. There is much more about media, science journalism, blogging, social networking, communications, science publishing, Open Access and that kind of stuff. And videos. And I am always surprised how many people (including veteran serious bloggers) really like Clock Quotes! They get comments here and on FriendFeed and Facebook.
So, tell me also what kinds of posts you like here? What makes you keep coming back for more? What would you like me to do more? And also, what do you skip and ignore?

Today’s carnivals

49th edition of the Festival of the Trees is up on The Organic Writer
Friday Ark #302 is up on Modulator.

Clock Quotes

If there were no schools to take the children away from home part of the time, the insane asylum would be filled with mothers.
– Edgar Watson Howe

Today’s carnivals

Carnival of Evolution #25 is up on Culturing Science.
Berry Go Round #29 is up on Agricultural Biodiversity Weblog.

Seven Questions….with Yours Truly

Last week, my SciBling Jason Goldman interviewed me for his blog. The questions were not so much about blogging, journalism, Open Access and PLoS (except a little bit at the end) but more about science – how I got into it, what are my grad school experiences, what I think about doing research on animals, and such stuff. Jason posted the interview here, on his blog, on Friday, and he also let me repost it here on my blog as well, under the fold:

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The Best of June

I posted only 105 times in June. It is summer, and in summer traffic falls, weather is too nice to stay inside, and blogs tend to go on vacation or at least slow down. And I wrote about it in No, blogs are not dead, they are on summer vacation.
But this does not mean that this blog was on vacation. Along with a bunch of cool videos and announcements, I wrote several other posts, some garnering quite a lot of commentary, most in some way touching on media, blogging and science journalism.
See, for example, Why is some coverage of scientific news in the media very poor?
Or Am I A Science Journalist?.
Or ‘Going Direct’ – the Netizens in former Yugoslavia.
Or The continuum of expertise.
Or the brief links+notes posts If scientists want to educate the public…but is that the right question to begin with? and On media articles linking to scientific papers (and other sources).
I got interviewed for a newspaper and – in a much longer form and on a completely different topic – for a blog.
I wrote a book review of ‘Bonobo Handshake’ by Vanessa Woods and then collected links to all the recent and upcoming books written by science bloggers.
I went to Philadelphia and then wrote a post about the meeting about vaccinations, social media and how to counteract anti-vaccionationist movement.
The series of Q&As with participants of ScienceOnline2010 continued with looks into the lives and careers of Cassie Rodenberg, Travis Saunders, Julie Kelsey, Beatrice Lugger and Eric Roston.
Workwise, I announced PLoS ONE Blog Pick of the Month for May 2010. I also blogged about a PLoS ONE paper about bluefin tuna trying to spawn in the midst of the Guulf oil spill and again about a paper that explains how exactly Vesuvius killed the people of Pompeii, and then again about a paper that explores the way bacteria get transmitted from the mouth of one Komodo dragon to another.

Beauty and Science Merge in Illustrators’ Exhibit at NCSU Libraries

From the NCSU Libraries News:

The best in the world of science illustration will be hosted in a beautiful display featured in the D. H. Hill Library Special Collections Exhibit Gallery at North Carolina State University from June 14 through the first week in August. The Guild of Natural Science Illustrators (GNSI), founded at the Smithsonian Institution in 1968, is working with the NCSU Libraries to present “The Art in Science: Annual Exhibit of the Guild of Natural Science Illustrators.” Ranging from pen and ink drawings to the latest digital animations, the juried exhibit is a great chance to see some of the most exciting work being done by today’s science illustrators.
“We are delighted and honored to host this event,” explains Susan Nutter, Vice Provost and Director of Libraries. “NC State, of course, has a national reputation in the animal sciences, entomology, natural resources, and other natural sciences–and our design school is among the nation’s best. This is a great opportunity for our students, faculty, and the public to see these disciplines combined into a unique blend of artistic aesthetic with the communication of scientific principles.”
The GNSI, which has thousands of members throughout the globe, provides a forum to celebrate and advance the work of the artists who illustrate the textbooks, journals, media, and other learning materials that permeate the academic and scientific worlds.
While the works chosen by the GNSI jury to be displayed at the NCSU Libraries serve mainly to make scientific principles easily to understand and enjoy, they are in themselves beautiful works of design and art. The exhibit will be particularly inspirational for students who are thinking about a career in science illustration, faculty looking for ways to enhance their teaching, and anyone who loves nature and good design.
The exhibit is free and open to the public during regular hours at the D. H. Hill Library on the NC State campus. Hours can be found on the Libraries’ web site.

Bios of scheduled speakers:

KATURA REYNOLDS coordinated the GNSI Annual Members Exhibit in coordination with group’s 2010 summer conference in Raleigh. A resident of Eugene, Oregon, Katura attended the University of California at Santa Cruz, earning a BA in art in 1997, and a graduate certificate in science illustration in 2002. Her own illustration work has been used at the Smithsonian Institute’s National Museum of Natural History, at the Huntington Botanical Gardens, and in a variety of other publications and museum exhibits.
GAIL GUTH is a freelance artist and principal and owner of the firm Guth Illustration & Design, specializing in natural science illustration and graphic design. Her clients include local firms, national publishers, and individual researchers. She also teaches workshops in drawing and sketching and watercolor landscapes. Her work combines traditional techniques with computer graphics, and ranges from small design projects to exhibit graphics, academic publications and book illustrations.
PATRICIA SAVAGE is a North Carolinian who has been a full-time fine artist since 1989. Several of Patricia’s botanical paintings are featured in Today’s Botanical Artists. The Pastel Journals’ 6th Annual Pastel 100 Competition awarded Patricia with Best in Wildlife and Honorable Mention in Wildlife. She served as Artist in-Residence in Denali National Park and joined Smith College and PBS The 1899 Harriman Expedition Retraced: A Century of Change. Her work has appeared in The Best in Wildlife Art 1 and 2, Focus Magazine (Italy), US Art, Wildlife Art, and Wildlife in North Carolina. She has exhibited at the Leigh Yawkey Woodson Art Museum, the Bell Museum of Natural History, the National Geographic Society, the U. S. Botanic Gardens, and Walt Disney World’s Animal Kingdom.

Are Zombies nocturnal?

day of the dead.jpgBlame ‘Night of the Living Dead’ for this, but many people mistakenly think that zombies are nocturnal, going around their business of walking around town with stilted gaits, looking for people whose brains they can eat, only at night.
You think you are safe during the day? You are dangerously wrong!
Zombies are on the prowl at all times of day and night! They are not nocturnal, they are arrhythmic! And insomniac. They never sleep!
Remember how one becomes a zombie in the first place? Through death, or Intercision, or, since this is a science blog and we need to explain this scientifically, through the effects of tetrodotoxin. In any case, the process incurs some permanent brain damage.
One of the brain centers that is thus permanently damaged is the circadian clock. But importantly, it is not just not ticking any more, it is in a permanent “day” state. What does that mean practically?
When the clock is in its “day” phase, it is very difficult to fall asleep. Thus insomnia.
When the clock is in its “day” phase, metabolism is high (higher than at night), thus zombies require a lot of energy all the time and quickly burn through all of it. Thus constant hunger for high-calory foods, like brains.
Insomnia, in turn, affects some hormones, like ghrelin and leptin, which control appetite. If you have a sleepless night or chronic insomnia, you also tend to eat more at night.
But at night the digestive function is high. As zombies’ clock is in the day state, their digestion is not as efficient. They have huge appetite, they eat a lot, but they do not digest it well, and what they digest they immediately burn. Which explains why they tend not to get fat, while living humans with insomnia do.
Finally, they have problems with wounds, you may have noticed. Healing of wounds requires growth hormone. But growth hormone is secreted only during sleep (actually, during slow sleep phases) and is likewise affected by ghrelin.
In short, a lot of the zombies’ physiology and behavior can be traced back to their loss of circadian function and having their clock being in a permanent “day” state.
But the real take-home message of this is…. don’t let your guard down during the day!
sbzombies_blogaroundtheclock.png
Picture of me as a Zombie (as well as of all my Sciblings – go around the blogs today to see them) drawn by Joseph Hewitt of Ataraxia Theatre whose latest project, GearHead RPG, is a sci-fi rogue-like game with giant robots and a random story generator – check it out.

Revenge of the Zombifying Wasp (repost)

Revenge of the Zombifying WaspAs this is a Zombie Day on scienceblogs.com, here is a re-post of one of my old post about one of the coolest parasites ever (from February 04, 2006):
a1%20ampulex_compressa.jpgI am quite surprised that Carl Zimmer, in research for his book Parasite Rex, did not encounter the fascinating case of the Ampulex compressa (Emerald Cockroach Wasp) and its prey/host the American Cockroach (Periplaneta americana, see also comments on Aetiology and Ocellated).
In 1999, I went to Oxford, UK, to the inaugural Gordon Conference in Neuroethology and one of the many exciting speakers I was looking forward to seeing was Fred Libersat. The talk was half-hot half-cold. To be precise, the first half was hot and the second half was not.
In the first half, he not just introduced the whole behavior, he also showed us a longish movie, showing in high magnification and high resolution all steps of this complex behavior (you can see a cool picture of the wasp’s head here).
a2%20wasp-cockroach.jpgFirst, the wasp gives the roach a quick hit-and-run stab with its stinger into the body (thorax) and flies away. After a while, the roach starts grooming itself furiously for some time, followed by complete stillness. Once the roach becomes still, the wasp comes back, positions itself quite carefully on top of the raoch and injects its venom very precisely into the subesophageal ganglion in the head of the roach. The venom is a cocktail of dopamine and protein toxins so the effect is behavioral modification instead of paralysis.
Apparently, the wasp’s stinger has receptors that guide it to its precise target:

“To investigate what guides the sting, Ram Gal and Frederic Libersat of Ben-Gurion University in Beer-Sheva, Israel, first introduced the wasp to roaches whose brains had been removed. Normally, it takes about a minute for the wasp to find its target, sting, and fly off. But in the brainless roaches, the wasps searched the empty head cavity for an average of 10 minutes. A radioactive tracer injected into the wasps revealed that when they finally did sting, they used about 1/6 the usual amount of venom. The wasps knew something was amiss.”

The wasp then saws off the tips of the roach’s antennae and drinks the hemolymph from them. It builds a nest – just a little funnel made of soil and pebbles and leads the roach, by pulling at its anteanna as if it was a dog-leash, into the funnel. It then lays an egg onto the leg of the roach, closes off the antrance to the funnel with a rock and leaves. The roach remains alive, but completely still in the nest for quite some time (around five weeks). The venom, apart from eliminating all defence behaviors of the roach, also slows the metabolism of the cockroach, allowing it to live longer without food and water. After a while, the wasp egg hatches, eats its way into the body of the roach, eats the internal organs of the roach, then pupates and hatches. What comes out of the (now dead) cockroach is not a larva (as usually happens with insect parasitoids) but an adult wasp, ready to mate and deposit eggs on new cockroaches.
Why was the second half of the talk a disappointment? I know for a fact I was not the only one there who expected a deeper look into evolutionary aspects of this highly complex set of behaviors. However, the talk went into a different direction – interesting in itself, for sure, but not as much as an evolutionary story would have been. Libersat described in nitty-gritty detail experiments that uncovered, one by one, secrets of the neuroanatomy, neurophysiology and neurochemistry of the cockroach escape behavior – the one supressed by toxin – as well as the chemistry of the toxin cocktail. Ganglion after ganglion, neuron after neuron, neurotransmitter after neurotransmitter, the whole behavior was charted for us on the screen. An impressive feat, but disappointing when we were all salivating at a prospect of a cool evolutionary story.
He did not say, for instance, what is the geographic overlap between the two species. I had to look it up myself afterwards. American cockroach can be found pretty much everywhere in the world. The wasp also has a broad geographical range from Africa to New Caledonia (located almost directly between Australia and Fiji) and, since 1941, Hawaii (another example of a non-native species wreacking havoc on the islands), but not everywhere in the world, especially not outside the tropics – there are most definitely parts of the planet where there are roaches but no Ampulex compressa.
In most cases in which one species is suspectible to the venom or toxin of another species, the populations which share the geography are also engaged in an evolutionary arms-race. The victim of the venom evolves both behavioral defenses against the attack of the other species and biochemical resistance to the venom. In turn, the venom evolves to be more and more potent and the animal more and more sneaky or camouflaged or fast in order to bypass behavioral defenses.
There are many examples of such evolutionary arms-races in which one of the species is venomous/toxic and the other one evolves resistance. For instance, garter snakes on the West Coast like to eat rough-side newts. But these newts secrete tetrodotoxin in their skins. The predator is not venomous, but it has to deal with dangerous prey. Thus, in sympatry (in places where the two species co-exist) snakes have evolved a different version of a sodium channel. This version makes the channel less susceptible to tetrodotoxin, but there is a downside – the snake is slower and more lethargic overall. In the same region, the salamanders appear to be evolving ever more potent skin toxin coctails.
Similar examples are those of desert ground squirrels and rattlesnakes (both behavioral and biochemical innovations in squirrels), desert mice (Southwest USA) and scorpions (again it is the prey which is venomous), and honeybees and Death’s-Head sphinx-moths (moths come into the hives and steal honey and get stung by bees after a while).
But Libersat never wondered if cockroaches in sympatry with Emerald wasps evolved any type of resistance, either behavioral or physiological. Perhaps the overwhelming number of roaches in comparison with the wasps makes any selective pressure too weak for evolution of defenses. But that needs to be tested. He also never stated if the attack by the wasp happens during the day or during the night. Roaches are nocturnal and shy away from light. The movie he showed was from the lab under full illumination. Is it more difficult for the wasp to find and attack the roach at night? Is it more difficult for the roach to run away or defend itself during the day? Those questions need to be asked.
Another piece of information that is missing is a survey of parasitizing behaviors of species of wasps most closely related to Ampulex compressa. Can we identify, or at least speculate about, the steps in the evolution of this complex set of behaviors (and the venom itself)? What is the precursor of this behavior: laying eggs on found roach carcasses, killing roaches before laying eggs on their carcasses, laying eggs on other hosts? We do not know. I hope someone is working on those questions as we speak and will soon surprise us with a publication.
But let me finish with a witty comment on Zimmer’s blog, by a commenter who, for this occasion, identified as “Kafka”:

“I had a dream that I was a cockroach, and that wasp Ann Coulter stuck me with her stinger, zombified my brain, led me by pulling my antenna into her nest at Fox News, and laid her Neocon eggs on me. Soon a fresh baby College Republican hatched out, burrowed into my body, and devoured me from the inside. Ann Coulter’s designs may be intelligent, but she’s one cruel god.”

Update: That post on The Loom attracted tons of comments. Unfortunately, most of them had nothing to do with the cockroaches and wasps – Carl’s blog, naturally, attracts a lot of Creationists so much of the thread is a debate over IDC. However, Carl is happy to report that a grad student who actually worked on this wasp/cockroach pair, appeared in the thread and left a comment that, among else, answers several of the behavioral and evolutionary questions that I asked in this post.
Update 2: You can watch some movies linked here and here.

Clock Quotes

Article 249. It shall also be qualified as attempted murder the employment which may be made against any person of substances which, without causing actual death, produce a lethargic coma more or less prolonged. If, after the person had been buried, the act shall be considered murder no matter what result follows.
– Haitian Penal Code

This is 10,000th post at A Blog Around The Clock

Just saying. I like big round numbers…

PLoS ONE Blog Pick of the Month for June 2010…

…was just announced on everyONE blog. Go and see who won!
And while there, check out the latest edition of the (bi)weekly Blog/Media coverage.