Just a brief update on a post from this summer regarding the mystery of Amelia Earhart's disappearance.
The team that claimed to have discovered the Pacific island site where pilot Amelia Earhart and navigator Fred Noonan allegedly perished as castaways has now announced new evidence: an object formerly identified as a turtle bone that may turn out to be part of a human finger bone.
"Finding Amelia," the two-hour program that aired on Discovery Channel tonight, contains the usual mixture of intriguing circumstantial evidence, free-wheeling speculation, and excessive padding with background information. Special feature of this program: horror-movie speculation about the dead or dying being devoured by vicious crabs.
Will the new information solve the case? As team leader Ric Gillespie says, "I crossed my threshold of belief long ago." Indeed.
To save you the trouble of watching the whole thing for yourself:
The program doesn't actually provide any answers about the finger bone—which seems to be the only thing new here; the rest of the information has been published in Gillespie's 2006 book and dribbled out in various news reports over the years.
The researchers still harp on the issue of "touch DNA," which, as I suggested last time, was less than a long shot. Somewhat to my surprise, DNA was indeed present. I was less surprised when I learned the result: turns out that the DNA recovered from two small objects did not match Earhart's—because it was Gillespie's. Naturally, he is shocked and mystified, because he claimed he never directly handled the items.
His response: "When you test the evidence and the answer is 'no,' the answer is not 'no': it's 'not yet.'" (huh?) "You have to ask the right questions," he says. A revealing statement.
He may indeed have solved the mystery or Amelia Earhart, but the new evidence thus far turns out to be chimeric, and if the foregoing represents his idea of scientific method, it's no wonder he's having trouble convincing people.
"In fiction, the principles are given, to find
the facts: in history, the facts are given,
to find the principles; and the writer
who does not explain the phenomena
as well as state them performs
only one half of his office."
Thomas Babington Macaulay,
"History," Edinburgh Review, 1828
Showing posts with label Genetics and History. Show all posts
Showing posts with label Genetics and History. Show all posts
Sunday, December 12, 2010
Saturday, August 7, 2010
Coming Attractions: this Sunday, on National Geographic, "and Man created Dog"
Just a heads-up on a new program about the human role in the evolution of the dog.
Here, an excerpt:
It runs Sunday evening at 9 p.m.
More later, perhaps.
Here, an excerpt:
It runs Sunday evening at 9 p.m.
More later, perhaps.
Labels:
Evidence,
Genetics and History,
History and Science
Tuesday, June 8, 2010
New Clues as to Amelia Earhart's Fate?
Discovery News reports:
The suggestion of hard evidence from "touch DNA" sounds intriguing but strikes me, at first thought, as a bit of a stretch. Although the relatively new technique is able to identify samples from only a handful of cells (rather than, as earlier more extensive amounts of tissue, bodily fluid, or other human material), I would tend to suspect that any samples here—given that we seem to be dealing with exposed objects (the plane, if present, is assumed to be deep under water) would be badly degraded. The report notes, for example, how quickly bones aged and broke down in the island environment. Still, it is possible, I suppose, that genetic material might have adhered to a protected interior surface of one of the objects such as the knife and somehow survived.
The disappearance of the "aviatrix" (a whole etymological and social history in that antiquated word) has fascinated the public for over seven decades, and, like other mysteries, led to much speculation, much of that wild. At the one end of the spectrum are suggestions that she was on a secret spy mission for the US government. At the other: the demythologizing explanation of poor piloting and navigational skills, or at least preparations wholly inadequate for a trip of such magnitude. Both allow for the possibility of a forced landing in an area made more dangerous by the proximity of Japanese forces as tensions in the Pacific mounted. Sometimes the most mundane truth proves to be the most tragic.
Tantalizing new clues are surfacing in the Amelia Earhart mystery, according to researchers scouring a remote South Pacific island believed to be the final resting place of the legendary aviatrix.The article, noting the 1940 discovery of skeletal remains (since lost) "attributed to a white female of northern European extraction, about 5 feet 7 inches tall," goes on to detail circumstantial evidence of a castaway campsite, based on the artifacts.
Three pieces of a pocket knife and fragments of what might be a broken cosmetic glass jar are adding new evidence that Earhart and her navigator Fred Noonan landed and eventually died as castaways on Nikumaroro, an uninhabited tropical island in the southwestern Pacific republic of Kiribati. The island was some 300 miles southeast of their target destination, Howland Island.
"These objects have the potential to yield DNA, specifically what is known as 'touch DNA','" Ric Gillespie, executive director of The International Group for Historic Aircraft Recovery (TIGHAR), told Discovery News in an email interview from Nikumaroro. (read the rest)
The suggestion of hard evidence from "touch DNA" sounds intriguing but strikes me, at first thought, as a bit of a stretch. Although the relatively new technique is able to identify samples from only a handful of cells (rather than, as earlier more extensive amounts of tissue, bodily fluid, or other human material), I would tend to suspect that any samples here—given that we seem to be dealing with exposed objects (the plane, if present, is assumed to be deep under water) would be badly degraded. The report notes, for example, how quickly bones aged and broke down in the island environment. Still, it is possible, I suppose, that genetic material might have adhered to a protected interior surface of one of the objects such as the knife and somehow survived.
The disappearance of the "aviatrix" (a whole etymological and social history in that antiquated word) has fascinated the public for over seven decades, and, like other mysteries, led to much speculation, much of that wild. At the one end of the spectrum are suggestions that she was on a secret spy mission for the US government. At the other: the demythologizing explanation of poor piloting and navigational skills, or at least preparations wholly inadequate for a trip of such magnitude. Both allow for the possibility of a forced landing in an area made more dangerous by the proximity of Japanese forces as tensions in the Pacific mounted. Sometimes the most mundane truth proves to be the most tragic.
Tuesday, May 19, 2009
Practical Things You Can Learn from Studying Science. Lessons from history
A recent article by John Malone and Brian Oliver, "The genomic 'inner fish' and a regulatory enigma in the vertebrates," in the Journal of Biology (an OpenAccess publication, always a good thing) managed to include one of my favorite scientific anecdotes:
Even before the origin of species by descent from a common ancestor was posited, it was realized that groups of animals had related morphologies. Georges Cuvier, the father of comparative anatomy, viewed anatomical structures though the lens of form and function. Similar looking anatomical structures should have similar function, and anatomy could be used diagnostically to group organisms – a theory he termed "the correlation of parts" [1]. A famous story illustrates the idea. One of Cuvier's students dressed as the Devil with horns on his head and hoof-shaped shoes burst into Cuvier's bedroom when he was asleep and said, "I am the Devil. I have come to devour you!" Cuvier woke up and replied, "I doubt whether you can. You have horns and hooves. You eat only plants."Cuvier thereupon rolled over and went back to sleep.
Thursday, February 12, 2009
Evolving and Thinking: Hampshire College Launches Darwin Anniversary Celebration
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It’s a shame in more ways than one that today's publicity stunt by the Hampshire Students for Justice in Palestine will dominate any press coverage of my college this week. What we—and the wider world—should be talking about is the genuinely exciting scholarly and pedagogical work that takes place here day in and day out: highlighted at the moment by the launching of a meticulously planned year-long series of events celebrating the bicentennial of the birth of Charles Darwin: “Darwin Across the Disciplines.”
Today’s kick-off event took the form of a birthday party (with coffee and cake) built around “Darwin and Me” (I? me? proof that usage or at least attitudes have “evolved” since the controversies over Winston cigarettes and good grammar vs. good taste, back in the day when one could still advertise cigarettes on tv?). Herewith, a synopsis:
Philosopher and organizer Laura Sizer introduced the event with some remarks on Darwin’s place in intellectual history and his legacy. In her own work, he was of signal importance as a pioneer of rigorous research into the emotions who demonstrated that humans and animals in fact shared similar practices: a welcome reminder in several regards, for most people know Darwin—if at all (which seems increasingly doubtful in the US)—as the theorist of evolution alone.
Evolutionary biologist Charles Ross then explained his clever participatory Darwinian social-intellectual exercise, “Evolving Hampshire”:
[an] attempt to model the principles of descent with modification (evolution) and natural selection. Throughout the spring the campus community will watch an idea evolve as it moves from class to class. Participating classes in a variety of disciplines will answer the question: “What is Hampshire?” The question will start in one class, then move through a series of classes over time, with selected answers moving forward with modification.
Each student in a class will select the best answer from those produced by an earlier group (generation). Then, individuals will modify the answer from the perspective of their course’s focus or discipline,
* * *
Faculty from a wide variety of disciplines spoke (generally, with one PowerPoint slide per person) for five minutes each about the ways that evolution (writ broadly) played a role in their thinking and work.
• Psychologist Rachel Conrad spoke on Darwin as an originator of developmental psychology. Referring to one of her long-standing personal and research interests, she called attention to the subtle relational thinking in his unpublished writings, such as the observations that he made of his son, and the memorial that he wrote upon the death of his daughter. The conclusion: The conventions of academic discourse can sometimes obscure the richer lessons that a writer sees but often does not write about in formal work. (A nice point for Rachel, in particular, as she is a psychologist during the work day and a poet in her leisure hours.)
• Professor of Visual Art Robert Seydel took the Chinese ideogram, “hsin,” or new—beloved of Ezra Pound—as the point of departure for a series of observations on the rise of new open rather than closed literary forms, in particular, the American long poem, from Whitman to Pound, to Willialms, to the present. All these authors defined poetry, he said, as “works of the field, works of evolution.”
• Geologist Steve Roof, with the aid of a large graph, spoke of Darwin’s contributions to geology: specifically the evolving notion of the age of the earth, from the Renaissance to the present. It was really like punctuated evolution—marked by alternating periods of stability and rapid change—rather than a smooth curve, he said. Darwin, he explained, was “a key player in all this,” as could be seen from his work on the evolution of coral atolls. The debates over the age of the earth, Steve argued, displayed a sort of “evolutionary” logic of their own, for one can see how ideas rose and fell, and how the judgment of fitness of a given idea very much depended on the cultural environment of the moment. Scientific ideas, he said, go extinct when proven wrong. Ideas, like genes and evolutionary innovations, outlast the individuals who bore them.
• Professor of Dance Rebecca Nordstrom gave the most unusual presentation in that it took the form of a kinetic performance. She taught the audience an eight-count gestural phrase and then led us through a series of variations: slow, then quick and energetic, and finally, heroic and demonstrative. Her larger point was that “movement is learned.” Showing a slide of dancers cavorting across a stage, she reminded us: “we’ve evolved to be bipeds—but we’ve also evolved to be what you see in the picture—to dance upside down and on our hands.” She also reminded us that frequent back pain is a legacy of the combination of large head and bipedal posture. Her engaging parting advice was to use that head to help the back: occasionally, imagine that your head is a helium balloon, light and buoyant, floating upward.
• Christoph Cox spoke about his work as a Professor of Philosophy and also as a curator of avant-garde art installations. In philosophy, he said, Darwin was most valuable for having helped to eliminate the ontological notion of essentialism, or fixed types in nature. He proceeded to draw a parallel between what he called the fixed linear forms of classical music and the corresponding physics of the time. He contrasted this model with the experimental music of the modern era, in which a composer produces not a completely dictated work, but instead a set of parameters that, in the course of performance, acquire a sort of existence of their own: not unlike the children whom we educate and then send into the world.
• Professor of Evolution and Cognition Sarah Partan chose to emphasize Darwin’s role as an animal behaviorist. As she noted, and as we saw today, many fields can claim him. Like both Rachel Conrad and Laura Sizer, she cited the influence of his The Expression of the Emotions in Man and Animals. His finding of the continuity of expression helped to break down the earlier artificial distinction between so-called higher and lower species. Noting that Darwin was one of the greatest and most meticulous observers of nature, Sarah used as an example his analysis of the expressions of hostility and submissiveness on the part of the dog (in which the opposite emotion is represented by an opposite body posture).
• I chose to speak on historical genetics, proceeding from the observation that, whereas the Nazi legacy had driven us to deny the existence of race, modern science seemed to be pushing us in the opposite direction and thereby provoking consternation. In the words of one influential anthropological blogger: “Ethnicity Strikes Back.” After outlining some of the principal findings of Jewish genetics, I focused on three cases in which genetic evidence has largely borne out oral tradition of descent: (1) Many descendants of the priestly caste of Cohanim possess a common Middle Eastern marker dating back 3000 years. (2) The same marker also appears among the priestly caste of the black Lemba of South Africa, who display Jewish practices and claim to have arrived centuries ago by boat from a place that sounded like Yemen. (3) Members of the priestly tribe of Levi, unlike Cohanim, display a divergence between Sephardim and Ashkenazim. The Ashkenazi Levite Modal Haplotype is of Central Asian rather than Middle Eastern origin and appears to represent the legacy of the Turkic Khazars who converted to Judaism in the early Middle Ages.
• Professor of Computer Science Lee Spector won the prize for most complex slide, for it contained an array of digital animations, which he proceeded to explain in detail. One of the most exciting developments in the sciences has been the field of evolutionary computation, in which he is a leader. As he put it, "Darwin showed how organisms evolved for success in the random environment of the natural.” "Maybe we can steal that algorithm that we received from Darwin and use it for solving problems—use it to design things that we can’t design for ourselves.” He explained a variety of examples that we were watching on-screen, from simple experiments to technological applications, such as an antenna that could be programmed to reconfigure itself for changing tasks. A brave new world, indeed.
It was a fitting conclusion to a stimulating series of talks. Professor of Biology (and Resident Curmudgeon, as he prefers to be known) Lynn Miller set the tone for the question-and-answer session when he provocatively challenged the underlying assumption of the whole event by declaring that Darwin’s ideas of evolution rested on a hypothesis (lacking a mechanism) that only gained relevance and true credibility following Mendel’s discovery of genetics. As one could imagine, the ensuing discussion was a lively one—as the year’s series of events promises to be.
Sunday, August 26, 2007
Who's Your Daddy?
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It's an intriguing question, and not just because this is the Red Sox nation and we are locked in another struggle for the pennant with the dreaded Yankees in the final weeks of the season.
In one case, at least (well, three that we did not know about), the answer is James Brown. Turns out that the "Godfather of Soul" was also, as a New York Times reporter put it, a "Father Many Times Over." "Both fans and lawyers have been hard-pressed to keep up with the revelations concerning his multiple marriages and offspring (legitimate or other).
In another case, it's the czar. In August,
An archaeologist in Yekaterinburg, the city where the royal Romanov family was imprisoned and then murdered, said clues left by a leader of the family’s assassins had led investigators to a makeshift grave where they found the possible remains of the czar’s son, Aleksei, and one of his daughters.
The remains were of persons of the appropriate sex and age, and scientists planned to confirm the identification through DNA testing. It may be a tough sell, however, as the report went on to suggest, for no amount of scientific proof will convince some people:
"The leadership of the Russian Orthodox Church has never fully acknowledged that the remains of the czar were discovered in 1991, even though scientists conducted extensive DNA tests, using samples from relatives of the royal family, that appeared to prove their authenticity."
[Aside: The reporter's use of the terms, "murdered" and "assassins," reflects timid modern sensibilities; the proper term should nonetheless be: "executed." When a dynasty claims to rule on the basis of biology--genealogy and genetics--it should come as no surprise that their opponents sometimes choose to end its rule by "biological" means, as well.]
And then, of course, if we're talking about a great-great-great-great-great-great-great-great-great-great granddaddy there was the revelation that Barack Obama is distantly related to President George W. Bush, and via his great-great-great-great-great-great-great-great-great granddaddy, to Vice President Dick Cheney.
Why DNA here? The study of DNA evidence, now familiar from criminal investigations and medical research, has become increasingly prominent in the historical field, as well. Its application in historical forensics (as in the case of the Romanov family) and the pursuit of individual genealogical history--popularized, for example, in the PBS television series on "African American Lives" (two installments, 2006, 2008)--has probably garnered the most attention. However, it is arguably most intriguing and productive when used to investigate "deep" history and the patterns of human evolution. The micro- and macrohistorical applications alike are moreover coming to play an ever greater, but by no means unproblematic, role in debates over ethnic and cultural identity. As a result, both aspects of the question will receive regular coverage here.
* * * * * * * * * * * *
UPDATES
James Brown Update, November 2007:
As the New York Times Notes on the News reports:
A few months ago, trustees for Mr. Brown’s estate revealed that DNA testing has turned up at least three adult children, born out of the wedlock, who have filed for a piece of the estate even though they are not named in his will, which was drafted in 2000.
The heirs he did name in his will, furious over being left a rather meager inheritance of “personal items” they say amount to his “pots and pans,” have filed a lawsuit against the estate.
James Brown Update, July 2008:
The saga continues (although the reporter's attempt to employ the metaphors of twisting and tangling itself becomes contorted): "Like the tangled knot that was the life of the flamboyant Mr. Brown, who had multiple wives, consorts, children and grandchildren, some with unproven paternity, his estate is also in a twist." On 9 July, "a state appeals court judge in South Carolina approved a surprise request by the two former business managers" to halt Christie's auction of his possessions.
Obama update (March 2008), "The Candidates As Cousins Much Removed":
Next time you're considering whether to run for president, don't forget to weigh the value of the fast and free genealogical research that comes with candidacy, guaranteed to uncover your ancestral connection to a modern-day celebrity -- or at least a minor historical figure.
Turns out that Obama is in addition related to Gerald Ford, Lyndon Johnson, Harry Truman, and James Madison--as well as Brad Pitt. The article also mentions the ancestry of Hillary Clinton and John McCain. In case you were wondering, it helpfully adds, "Genealogical data, experts caution, should not be used by voters to evaluate a candidate." (To be sure. But could it be any worse than the method by which they made their choice in 2004?).
Romanov update, April 2008: "Scientific tests have confirmed that bones found last year in Russia belong to the two missing children of Tsar Nicholas II, Russian officials say."
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