War on Science: CDC publishes suppressed study

March 15, 2008

On the eve of a major conference on health effects of DDT, the U.S. Centers for Disease Control published a study it had suppressed for several months, detailing pollution effects in the Great Lakes area. The author of the study, demoted but still outspoken, was grudgingly granted permission to attend the Kenaga International Conference on DDT and Health, which opened yesterday at Alma College in Alma, Michigan.

Alma Conference logo

Science won the skirmish, getting the study pried out of CDC. News coverage of the conference stopped short of spectacular so far: Only local Michigan media outlets provided coverage. If we won the war, but no one knew . . . ?

The Morning Sun suggested that further studies of health effects in the area are required, and that no successful cleanup of a toxic site is ever done without health studies showing the need.

[Jane] Keon[, chairwoman of the Pine River Superfund Citizen Task Force] hasn’t read the entire report but did read the portions about Gratiot County.

“There’s no new information, and everything mentioned is well-known and verified by ATSDR and CDC,” she said. “I understand that in addition to 200 researchers and much peer review the report data was reviewed by state and local health departments in the areas of concern without the complaint that the science was weak.

“We in the task force view the report as further proof that a full-blown health study is needed in Gratiot County. From our own studies we also know that communities with contaminated sites that have a health study to point to get very thorough cleanups, while communities that do not have a health study do not get thorough cleanups.”

The task force has twice applied for grants to perform a comprehensive local heath study but were turned down both times.

“The reasons offered (for rejection) seemed lame and illogical,” Keon said. “One time we were told that we didn’t have enough data, and yet that is why we desired the health study – to have a scientific collection of data.”

A citizens’ group in Washington, D.C., the Center for Public Integrity, obtained a copy of the study last year and made it available on the internet. There is no indication I can find of whether there were changes made in the study between the leaking and the formal publication.


Testing boosts memory, study doesn’t

March 7, 2008

This is why football players remember the games better than they remember the practices.

Is this really news? It was a jarring reminder to me. Ed at Not Exactly Rocket Science (just before his blog was swallowed up by the many-tentacled Seed Magazine empire) noted a study that shows testing improves performance more than study.

But a new study reveals that the tests themselves do more good for our ability to learn that the many hours before them spent relentlessly poring over notes and textbook. The act of repeatedly retrieving and using learned information drives memories into long-term storage, while repetitive revision produced almost no benefits.

More quizzes instead of warm-up studies? More tests? Longer tests? What do you think? Certainly this questions the wisdom of high-stakes, end of education testing; it also calls into question the practice of evaluating teachers solely on the basis of test scores.  Much grist for the discussion mill.

Here’s the citation to the study: Karpicke, J.D., Roediger, H.L. (2008). The Critical Importance of Retrieval for Learning. Science, 319(5865), 966-968. DOI: 10.1126/science.1152408

Karpicke is at Purdue; Roediger is at Washington University in St. Louis.


Gresham’s Law: DDT disinformation crowds out facts

February 18, 2008

I love irony.

Henry VIII devised a novel way to save money. He ordered coins be minted containing silver, as during the reign of Henry VII, but he ordered that the purity of the silver be reduced. Edward VI continued the policy so that, by the time of the rule of Queen Elizabeth I, royal advisor and financier Sir Thomas Gresham observed that most of the old, high-silver content coins were out of circulation, hoarded by people against future inflation, allowing the lesser-valued money to circulate. Gresham told Elizabeth the bad money drove out the good money.

Sir Thomas Gresham (c. 1519 – 21 November 1579), British financier and advisor to Queen Elizabeth I and earlier regents. Portrait c. 1554 by Anthonis Mor

Sir Thomas Gresham (c. 1519 – 21 November 1579), British financier and advisor to Queen Elizabeth I and earlier regents. Portrait c. 1554 by Anthonis Mor.

The principle had been observed earlier by Aristophanes and others. It is known in modern economics as Gresham’s Law, since 1858 when British economist Henry Dunning McLeod decided to honor Gresham by naming the rule after him.

The bad drives out the good, the cheap drives out the more expensive, gossip drives out good information — the principle is widely observed in areas beyond economics.

And so it is that with regard to DDT, the good information about the dangers of DDT and the benefits of restricting use of the chemical has been driven out of the marketplace by bad information claiming DDT is safe, and ignoring the significant benefits reaped when massive use of DDT was stopped.

And here’s the irony: DDT-happy critics of good environmental policy now claim to be the good information driven out by the “bad” information of DDT’s harms. No kidding. A columnist named Natalie Sirkin, in a column delivering almost nothing but bad, vile information, says bad information drives out the good, never once noting the irony.

The defense of DDT was, from the beginning, a lost cause. A few of us vainly hoped that science would prevail. We soon found that Gresham ’s Law, which states that bad currency drives out good currency, applies to science as well as to economics.

No kidding it applies. Do a Google search for “DDT” today and you’ll find all over the internet the disinformation of Gordon Edwards’ ghost and junk science purveyor Steven Milloy. You will have a difficult time finding any solid study showing how DDT nearly killed off the American bald eagle, however, and you’ll have to do a targeted search to learn of any dangers of DDT — information on human toxicity is almost impossible to find, though it’s easy to find many recountings of Gordon Edwards’ bold drinking of a teaspoon of DDT before lectures.

(Natalie and Gerald Sirkin write for the American Spectator; at this writing, Google features warnings on all of their material at the time of this writing, saying the site host may try to insert “malicious software” on your computer — so I have not linked there. This problem should sort itself out, I hope.)

(The Environmental Protection Agency (EPA) works to get a history of the agency up on the ‘net; a lot from the DDT ban era is now available at the EPA site for scholars; Milloy will not be happy to have factual rebuttal officially and easily available.)

Below the fold, I’ll offer a point-by-point rebuttal of the bizarre claims in favor of DDT and against the noble public officials who worked to restrict its use.

Read the rest of this entry »


Seattle Times special on fighting malaria

February 4, 2008

Dr. Bumsted at Biocultural Science and Management alerted me to the Seattle Times’ special section on fighting malaria. The extensive set of articles ran in the newspaper on Friday, February 1, 2008. You can order a copy of the special reports in a separate section here.

Child suffering from malaria. Seattle Times, February 1, 2008

Child suffering from malaria. Seattle Times, February 1, 2008

Photo caption from Seattle Times: “Malaria strikes hardest at young children, such as 5-month-old Mkude Mwishehe, who lies comatose in the regional hospital at Morogoro, Tanzania. Babies often die as a result of fever, anemia and brain damage caused when the mosquito-borne parasites destroy blood cells and clog blood vessels.”

Seattle’s news organizations look at malaria in large part because malaria is a target of the Bill and Melinda Gates Foundation.

The package features outstanding photography of malaria-affected Tanzania and Zambia, good interviews, in-depth reporting, good writing, and multi-media presentations that might be suitable for classroom work. The multi-media pieces could be used as examples of what students should be doing with PowerPoint projects.

The Seattle Times’ work on the fight against malaria is a tour-de-force masterpiece of what a newspaper can do to promote the public good. The newspaper demonstrates the heights writers can aspire to. Good on ’em, as Molly Ivins would say.

I have not found a single mention of experts calling for more DDT, as the junk-science purveyors do. There are several attempts to urge DDT by readers in the Q&A session, but the expert malaria fighters are careful with their facts — it’s a real education. Read the articles. The research and the work against malaria pushed by the Gates Foundation is exactly the research and work that DDT-happy advocates frustrate with their political screeds.

Which group does more to save Africans, those who fight malaria as described in The Seattle Times, or those who rail at environmentalists and call for more DDT?


March 14, 2008 conference on DDT and health

February 1, 2008

Poster for 2008 conference on DDT

Steven Milloy must be apoplectic.

On March 14, 2008, Alma College, in Alma, Mich., is hosting a conference examining what is known about the impact of DDT on human health and the environment.

The conference will bring together a number of national and international experts to frame and lead discussions of current knowledge of DDT. Attendees will engage with experts to plan what research or other projects are needed to address questions about the impact of DDT and other persistent organic pollutants (POPs).

The conference is jointly sponsored by the Center for Responsible Leadership at Alma College, the Ohio Valley Chapter of the Society for Environmental Toxicology and Chemistry, and the Pine River Superfund Task Force, a U.S. Environmental Protection Agency (EPA) community advisory group (CAG) for Superfund sites in the Pine River watershed in Michigan.

Why Alma College?

For a number of years students and faculty at Alma have helped support the work of the Pine River Task Force. The Superfund sites in the watershed of the Pine River resulted from the massive dumping of byproducts from production of DDT and a fire retardant based upon polybrominated biphenyls (PBBs) by Velsicol Chemical Company. In addition to general dumping of wastes, Velsicol was responsible in 1973 for one of the worst food contamination mistakes in history, when PBB was erroneously mixed with animal feed and remained undetected for a year.

While highly contaminated for decades, the Pine River watershed has been fortunate to be the location of Alma College, with a long tradition of community involvement, and also the home of a number of people with remarkable expertise. One of the long time members of the CAG was the late Eugene Kenaga (1917-2007), for whom the conference is named.

Eugene Kenaga

During World War II, Dr. Kenaga served as an officer in a malariology unit in the Pacific Theater, using DDT. For forty-two years he was a research scientists with the Dow Chemical Company, for many years in charge of their entomological research. In 1968 he served on a three-member blue ribbon pesticide advisory panel (for Michigan Governor George Romney) that restricted use of DDT in the state. After the formation of EPA, he served on a variety of EPA advisory panels. He was also one of the founders of the International Society of Environmental Toxicology and Chemistry (SETAC).

And:

Recently, the College, SETAC, and Task Force have become aware of an international campaign that questions the national and international restrictions on the use of DDT. Knowledge of this campaign led to the decision to bring together international experts and concerned citizens to discuss what is known and needs to be known about the impacts on human health and the environment arising from exposure to DDT and the other POPs.

Serious scholars, academic rigor, real scientists, real science, government agencies charged with protecting human health and environmental quality, the Center for Responsible — will any of the DDT advocates have the backbone to show? They don’t appear to fit any of those categories.

Eugene Kenaga International DDT Conference on Environment and Health
March 14, 2008
Alma College, Alma, Mich.

DDT: What We Know; What Do We Need to Know?

Speakers scheduled for the conference, listed below the fold.

Read the rest of this entry »


NAS evolution book too technical?

January 20, 2008

Joe Lapp, from Austin, Texas, posted this review on Amazon.com of the National Academy of Science’s book Science, Evolution and Creationism. It’s worth reading, and repeating. Despite Joe’s criticism, the book is well worth your time to read; if you know about the example Joe uses, you’re ahead of the game.

Cover of NAS book, Science, Evolution and Creationism

Beneath the fold.

In addition to Amazon, the book is available for free download at the National Academy of Science’s site. It’s a great backgrounder for anyone interested in learning “what scientists say” about evolution and creationism, from our nation’s oldest and most trusted society of science advisors (Lincoln called on NAS for advice, and wise policy makers still do).

Read the rest of this entry »


Follow a graduate student to Antarctica

January 3, 2008

Penguin Burgers appears to be a blog of a graduate student who will be off to Antarctica on a project, working with a team at North Carolina State University.

The blog appears to be rather an afterthought, an add-on. But consider: What if your class were able to follow this guy to Antarctica, and keep up regular communication with him through the blog?

There’s some great potential there. I plan to watch. Looks like this fellow is really looking forward to the trip.


Physics under fire: Fermilab budget cuts

December 22, 2007

Remember the State of the Union pledge to put science front and center in building the nation’s economy?

That was then, this is now: Fermilab is cutting projects due to reduced federal funding. The U.S. is ceding pre-eminence in particle physics to CERN in Europe, or anyone else who will simply spend the money.

Dorigo has the details and links, at A Quantum Diaries Survivor.

It is clear that the US congress does not believe pure research in subatomic physics something useful for the Nation. Let’s face it: we lived through sixty years of good funding on the standing wave of nuclear weapons research, but we do not seem to manage to fool anybody anymore: no more deadly tools from muons and neutrinos. So, no dough. Sad, but true. I only hope that Europe will be smarter and that particle research at CERN will continue as strong as it has been recently shown to be.

Regret to start your weekend on down notes; science does best if syncopation is not limited, however. Get out there and play.


Why creationists? Why Rachel Carson critics?

November 22, 2007

At least once a week I buy the New York Times. Tuesday’s edition carries the Science section. It’s better than a weekly science magazine.

And especially since the Dallas Morning News absent-mindedly closed down their award-winning science section and misplaced their award-winning science section editor, Tom Siegfried, the Times is even more important here in Dallas.

Last Tuesday’s main story explained a lot about some of the issues I write about here: Why do people deny obvious stuff — creationists, DDT nuts, history revisionists, Christian nationalists, and so on? Go check out “Denial Makes the World Go ‘Round.”

I’m sorta surprised the guys at denialism blog (“don’t mistake denialism for debate”) haven’t mentioned it.


DDT works! (When used carefully, in IVM, and sparingly)

November 20, 2007

Discover Magazine’s site has a solid story on DDT and malaria, “Can a maligned pesticide save lives.” Among other things, the article notes that Rachel Carson was scientifically accurate in her cited concerns that DDT was killing birds, and in fact later research of more than 1,000 peer-reviewed papers has born out her worries, and provided even greater evidence of damage.

Cover of November 2007 Discover Magazine, featuring an article on DDT's continuing use in the fight against malaria, and vindicating Rachel Carson's research citations with regard to injuries to birds.

Cover of November 2007 Discover Magazine, featuring an article on DDT’s continuing use in the fight against malaria, and vindicating Rachel Carson’s research citations with regard to injuries to birds.

The article details how DDT is used in integrated vector management (IVM), where pesticides are sparingly and carefully used to prevent their target pests from evolving resistance and immunity.  DDT’s abuse had bred widespread resistance in mosquito populations in Africa and other malaria-endemic locations, forcing the World Health Organization to abandon its ambitious program to eradicate malaria in a program dependent on DDT working for at least a year.

Steven Milloy and the Usual Suspects and Comrades in Junk Science, in the War on Science at AEI and CEI will start their distortions of the Discover article any moment now . . . three, two, one . . .


100 things about DDT: Dissecting #10

November 8, 2007

This is another in an occasional series of posts dissecting the claims made by JunkScience purveyor Steven Milloy’s “100 things you should know about DDT.” What I find in this list is a lot of deception, misleading claims, and general unjustified vitriol. In this post I’m looking at Milloy’s point #10.

Milloy said:

10. Rachel Carson sounded the initial alarm against DDT, but represented the science of DDT erroneously in her 1962 book Silent Spring. Carson wrote “Dr. DeWitt’s now classic experiments [on quail and pheasants] have now established the fact that exposure to DDT, even when doing no observable harm to the birds, may seriously affect reproduction. Quail into whose diet DDT was introduced throughout the breeding season survived and even produced normal numbers of fertile eggs. But few of the eggs hatched.” DeWitt’s 1956 article (in Journal of Agriculture and Food Chemistry) actually yielded a very different conclusion. Quail were fed 200 parts per million of DDT in all of their food throughout the breeding season. DeWitt reports that 80% of their eggs hatched, compared with the “control”” birds which hatched 83.9% of their eggs. Carson also omitted mention of DeWitt’s report that “control” pheasants hatched only 57 percent of their eggs, while those that were fed high levels of DDT in all of their food for an entire year hatched more than 80% of their eggs.

Considering Carson’s careful citing of studies on all sides of the issue, and her use of sources dating back 30 years and more, it would be difficult for her to have “represented the science of DDT erroneously.” Carson got the science right. Milloy doesn’t even get the quote of Carson right, however, deleting her main point, and editing it to set up a straw man argument which misleads unwary readers.

Carson represented the science faithfully. Milloy simply dissembles in his accusation that she got it wrong.

In fact, Carson offered more than 50 pages of citations to studies, virtually everything available on DDT and the other chemicals she wrote about, up to the time of publication. Carson had started working on the issue in 1948, and worked almost solely on the work that became Silent Spring between 1959 and the book’s publication. None of the studies she cited has been retracted. Most of the studies were determined to be accurate in follow-up studies.

I discuss this at some length, below the fold. Read the rest of this entry »


Nobelist’s biography questioned: We’re still inspired

November 7, 2007

Mario Capecchi’s story of his mother’s arrest by the Gestapo, and his life on the streets of Italy as a young boy, only piqued interest in the story of his winning a Nobel Prize in Medicine or Physiology, earlier this year.

It is such a great story, people set out to write it down in detail. Some of the details discovered, however, don’t quite square with historical records.

A group of reporters with the Associated Press uncovered the discrepancies. Realizing that the story comes from the memory of a very young child, so far the headlines and the stories have been corrective, but gently and adoringly so.

The story Capecchi has told repeatedly over the years in speeches and interviews begins when he is 3 and the Gestapo, Adolf Hitler’s secret police, snatch his mother before his very eyes and dispatch her to Dachau concentration camp. The peasant family that takes him in abandons him and he spends four years wandering about northern Italy – a street urchin, alone and begging for food.

At war’s end – on the boy’s ninth birthday – mother and son are reunited in the hospital ward where he is being treated for malnutrition and typhoid. They set sail for America where he flourishes, embarks on a brilliant research career – and goes on to win the Nobel Prize for medicine.

But The Associated Press, which set out to chronicle his extraordinary story in greater detail, has uncovered several inconsistencies and unanswered questions, chief among them whether his mother was in Dachau, and whether he really was for a long time a homeless street child.

You can read the full story at The Salt Lake Tribune.

This is a classic case. Memory differs from the facts. Human minds fill in details that would otherwise leave a mystery, and the details filled in differ from the details that can be corroborated.

This is part of what keeps history lively.

We see here also a demonstration that there is much we can never really know for sure. Historians work from imperfect records in the best of circumstances.

The director of the Dachau Memorial, Barbara Distel, said women weren’t imprisoned at Dachau until September 1943 – more than two years after Capecchi says his mother was arrested. She also said only Jewish women from eastern Europe were held in Dachau’s satellite camps.

”I do remember – I remember the Gestapo coming to the Wolfsgruben chalet,” Capecchi told AP in the interview, conducted days after his Nobel Prize was announced. ”It’s sort of like a photograph. I can tell you how many people were in the room, which ones were in uniform and which ones weren’t. Just boom. It’s there.”

Pressed to explain how he could be certain he was just 3 1/2 at the time and remember it so clearly, he stood by his account.

The big question we want answered here is this: How can we get more great people like Mario Capecchi? Can we get a few Nobelists out of the current generation of children?

No one proposes revisiting war to make kids great, so the fascination with Capecchi’s childhood is more academic, if still for inspiration.

In the end, we have a mystery. How did Capecchi get to be such a great man? There remains that great chapter near the end of the book; early chapters are missing.

Perhaps AP could put a team of reporters on a story to explain exactly how Capecchi’ s research explains what it does, and what it means down the road. That’s a story that needs to be told, too.


Washoe, pioneer in signing chimpanzees, dead at 42

November 1, 2007

News from Central Washington University in Ellensburg tells of the death of Washoe, the first chimpanzee to learn American Sign Language (ASL), the matriarch of a small clan of signing chimps who pushed the boundaries on our view of the intelligence of animals, especially the other great apes besides humans.

Washoe, undated photo from Central Washington University Washoe was named after Washoe County, Nevada, the home of the University of Nevada – Reno, where she was taken in 1966 after being captured in Africa as an infant.

Washoe, who first learned a bit of American Sign Language in a research project in Nevada, had been living on Central Washington University’s Ellensburg campus since 1980. Her keepers said she had a vocabulary of about 250 words, although critics contended Washoe and some other primates learned to imitate sign language, but did not develop true language skills.

She died Tuesday night, according to Roger and Deborah Fouts, co-founders of The Chimpanzee and Human Communications Institute on the campus. She was born in Africa about 1965.

Between Washoe and her progeny, extended family and students (she taught signing to several others of her species) and the more famous Koko, the gorilla who speaks ASL, our ideas of the learning ability of animals, their achievements dramatically challenged our ideas about the moral sense of animals, and the uniform and universal superiority of humans.

Fouts and the researchers at the University of Nevada raised several chimps who were taught ASL. One of the more interesting, to me, and genuinely thought-provoking stories was of one young chimp who attended church with her human family. She asked questions about church, and eventually asked to be be baptized (the local cleric performed the rite). This is a Rubicon of great import to creationists, and I have yet to find one who isn’t inflamed or enraged by the story one way or another.

Roger Fouts lovingly described Washoe’s life and accomplishments in Next of Kin (including the baptism story). Fouts defends the rights of chimpanzees, His accounts of the life of research chimpanzees trouble anyone with a moral sense. This book troubled me when I first read it almost a decade ago, and I find it still haunts me any time I visit a display of animals, in a zoo, aquarium, or even at a wildlife preserve (I have not been to a circus since I read the book, coincidentally).

Just wait until cetaceans and cephalopods figure out how to use ASL.

Further reading and resources:


Bring back the OTA, stop the War on Science

October 25, 2007

Bush administration officials make the case more powerfully that we need to resurrect the Office of Technology Assessment (OTA).

Bushies, going against their earlier claims that they accept that the nation needs to do something about changing climate, “eviscerated” testimony of a government official designed to protect public health. More voodoo science from Bush. According to The Carpetbagger Report:

Dr. Julie Gerberding, director of the Centers for Disease Control and Prevention, told a Senate panel yesterday that climate change “is anticipated to have a broad range of impacts on the health of Americans.” If that sounds a little vague and non-specific, there’s a good reason — the White House refused to let her say what she wanted to say.

Sadly, Carpetbagger Report lists several other instances in which White House officials have gutted the release of important information on global warming’s dangers.

If Osama bin Laden did something like that, we’d invade a smaller nation to stop it. Preventing Americans from being prepared for disaster is a terroristic threat under the Homeland Security Act, isn’t it? Is there a clause for citizen suits in there somewhere? Who will stand up to the abuses by George Bush?

Here’s the Washington Post story on the event. Here’s my previous post, with links to Denialism and Pharyngula, and even John Wilkins (love that picture of Snowflake!).

Hillary Clinton specifically calls for the recreation of OTA, a clue some of us politicos use to indicate she really does know what government under the Constitution should be doing. Other Democrats are friendly to the idea, but so far I’ve not heard a peep from any of the Republican presidential candidates. Orrin? What about you?

Bring back the OTA. Exorcise the demons of totalitarian Bushism.


Quote of the moment: Washing hands of the matter

September 23, 2007

Ignaz Semmelweiss

This is one of the classic stories of public health, an issue that most U.S. history and world history texts tend to ignore, to the detriment of the students and the classroom outcomes.

This is the story as retold by Christopher Cerf and Victor Navasky in The Experts Speak:

In the 1850s a Hungarian doctor and professor of obstetrics named Ignaz Semmelweis (pictured at left) ordered his interns at the Viennese Lying-in Hospital to wash their hands after performing autopsies and before examining new mothers. The death rate plummeted from 22 out of 200 to 2 out of 200, prompting the following reception from one of Europe’s most respected medical practitioners:

“It may be that it [Semmelweis’ procedure] does contain a few good principles, but its scrupulous application has presented such difficulties that it would be necessary, in Paris for instance, to place in quarantine the personnel of a hospital during the great part of a year, and that, moreover, to obtain results that remain entirely problematical.”

Dr. Charles Dubois (Parisian obstetrician), memo to the French Academy
September 23, 1858

Semmelweiss’ superiors shared Dubois’ opinion; when the Hungarian physician insisted on defending his theories, they forced him to resign his post on the faculty.

Update, September 26, 2007: Stephen J. Dubner at the Freakonomics blog pointed to a video, to an essay by Semmelweis, and to a column he and Steven D. Levitt had done earlier on handwashing. Maybe things aren’t as good as we had hoped.