john hawks weblog

paleoanthropology, genetics and evolution

books

  • Diamond's "World" is not enough

    Wed, 2013-04-24 11:45 -- John Hawks

    Rex Golub reviews Jared Diamond's book, The World Until Yesterday, and tries to explain why it rubs anthropologists the wrong way: "Anthropology, Footnoted: Jared Diamond’s The World Until Yesterday". Golub works in Papua New Guinea, the area of the world Diamond most closely examines in his book.

    Diamond has surely visited much more of the country than the highlands, but his intuitions about the country seem fundamentally shaped by the highlands. His immersion in that area, I believe, is the origin of his view that colonialism brings benefits, that people are willing to trade their old ways for new, and that imperial conquest brings few problems—in the long term. Then again, Diamond’s tone-deafness regarding these issues might be related to his scientific background. Bird species are morphologically distinct, but human communities in Papua New Guinea lack bright and clear boundaries. Cultures, languages, and subsistence techniques ooze across the landscape, passing through villages and hamlets with a mobility totally different than the learned behavior of birds. The issues at the heart of population ecology are calories, birthrates, and morbidity while the central topics of legitimate and empowering governance are dignity, freedom, and quality of life—the things we fight for, but not the sort of thing that you learn about studying avifauna. Only people, not birds, would rather die on their feet than live on their knees.

    Golub approaches the question of "What does an anthropologist have to offer?" but doesn't give a crystal clear answer. The anthropologist considers complexity and treats people as people, not birds -- to be sure. But is Diamond's account of small-scale societies doing anything different from what Marvin Harris might have done? If The World Until Yesterday were a dissertation, would it earn its writer a PhD in anthropology today?

    I'm inclined to think that cultural anthropology as it exists in the world today actually includes Jared Diamond...

  • Goodall plagiarism case

    Fri, 2013-03-29 16:39 -- John Hawks

    I'm back home now from a week on family vacation, catching up on news from the last few days. I have been dismayed to read about Jane Goodall's book debacle. She has been accused of plagiarism, fabricating meetings and interviews that did not happen, and spreading misinformation about the safety of genetically modified organisms. Michael Moynihan, who played a key role uncovering the plagiarism and fabrications of science writer Jonah Lehrer last year, has written the most in-depth account of Goodall's alleged transgressions: "Jane Goodall’s Troubling, Error-Filled New Book, ‘Seeds of Hope’"

    There is a sense in many of the reported accounts that Goodall’s co-author, Gail Hudson, is to blame. This is, of course, possible (Hudson did not respond to an email request for comment), but if Goodall had read her own manuscript—the one with her name on it—would she not have noticed the quotes from interviews with people she hadn’t spoken to? Wouldn’t a noted scientist double-check her source material? She is, after all, the person who accepted the publisher’s check and Seeds of Hope is written in the first person.

    Pat Shipman's reactions largely mirror my own: "Betrayal and Disappointment".

    Naturally the plagiarism is disturbing. But the shameful part is that poorly-researched and specious anti-GMO arguments in the book probably would not have been scrutinized without these charges of plagiarism. I see this lack of scrutiny as akin to the continuing science illiteracy of mainstream media, which I noted earlier this year: "Recantation of a former genetic know-nothing".

  • My review of "Paleofantasy"

    Thu, 2013-03-14 16:22 -- John Hawks

    I have a review of Marlene Zuk's new book, Paleofantasy, in this week's Nature: "Evolutionary biology: Twisting the tale of human evolution" [1].

    I can't replicate my review here, but for people who have access to Nature I thought I'd bring attention to it. And if you don't have access, I wanted to share a couple of my reactions.

    It was a fun book for me to read. Zuk brings a light-hearted skepticism to a broad array of topics in human evolution. She took as her focus a collection of "paleo-advice" ideas: barefoot running, paleo diet, back-to-nature parenting advice. She then added some uncritically-accepted scientific notions about our evolution, such as the idea that agriculture was "the worst invention ever devised". To each of these topics, she brings an array of recent science questioning or disproving the assumptions. The result is not to debunk ideas, but to give a fuller (and more nuanced) perspective on how much we know (and don't know) about our evolution.

    The serious issue underlying all these topics, which Zuk recognizes, is the difficulty of reconstructing Pleistocene environments. Some hypotheses assume a fairly detailed model of ancient environments -- the so-called "environment of evolutionary adaptedness". But ancient humans lived in an array of environments, more different than each other in many ways than different parts of today's globalized world. We are unquestionably living in environments no ancient humans knew, in population size, density, disease, lifespan, and many other ways. But in other ways, our difference from some ancient people is trivial compared to their diversity. Are we well-adapted to live in cities? Perhaps not in some ways, but maybe in others.

    Probably the best part of my review to share is the end:

    As an anthropologist, I observe that Zuk's use of the term 'fantasy' is just an emphatic way of describing the hypothesis-forming that is essential to evolutionary science. We play with hypotheses, explore their predictions and try very hard to falsify them. So it is, in a way, unremarkable that so many hypotheses proposed by anthropologists about ancient environments now seem to be wrong — and, in a few cases, even ridiculous.

    It means that science is working. Genomics, high-resolution climate records, and microscopic and isotopic evidence have changed our understanding of what the past has to offer. With that in mind, let the next round of palaeofantasies begin.

    Zuk's "very brief" overview of human evolution is a lot shorter than in other recent books on the topic. I found this to be a merciful change -- how many times do I really need to read about the Australopithecus-to-humans timeline? Readers who don't already know the basic timeline are unlikely to pick up the book, I would guess. Still, if you're looking for a "latest news" about early humans, this book is not directed that way. Where it excels is its coverage of recent evolutionary changes and the shifts in Holocene environments and genetics.

    The book is not without its weak points. Without quite enough of the "paleo-advice" topics to carry the whole story, there were some real differences in tone across the chapters, with some a bit drier than others.

    People coming to this book for "the right answer" about ancient environments are not going to find it. There is no right answer, at least not a scientific one, for many of the topics covered here. Zuk has done well to talk to a range of scientists, covering these different aspects of our evolutionary history, and discuss the reasons for their disagreement.

    I wish scientists would do that for themselves more often!


    References

    Synopsis: 
    A new book by Marlene Zuk challenges some paleo advice mongers.
  • An interview with trade science authors of 2012

    Sun, 2012-12-02 15:17 -- John Hawks

    The Guardian hosted a conversation among several authors with new trade books on science last year, including Steven Pinker, Brian Greene, James Gleick, Joshua Foer and Lone Frank: "Science writing: how do you make complex issues accessible and readable?" They share many experiences and insights about the need to make scientific concepts clear to a general audience.

    I liked this answer from Steven Pinker about the limits of analogy in science writing:

    Analogy is enormously powerful. In fact, one could argue that we understand everything except for the physical world of falling objects by analogy. If you look at our language it's almost all metaphorical. But, there is a difference between literary metaphor and scientific analogy, and that is in a literary metaphor the more connections there are between the figure of speech and the thing in the world the richer and more wonderful it is, and in the scientific analogy if there are too many ways in which you can relate the analogy to the world, that makes it a bad analogy, not a good one. Analogies have to be chosen and explained carefully. You've got to point the reader to the correspondence, point for point between the thing in the world you're explaining in terms of your analogy. To be whipsawed between one analogy and other so you don't know what point is doing the work, that's what can make an analogy misleading.

    Also, this response from Joshua Foer is provocative:

    What you're supposed to be doing in a science book or popular article is distilling, finding what is essential and communicating that. That's not just an act of storytelling, it's an act of thinking and it requires a kind of clarity of communication that not just the scientists but academics in general have moved away from and I think it makes them think less clearly.

    I agree with that. The act of writing here on the blog generally clarifies my thinking and makes me a better analyst. The beauty of blogging is that writing more about a topic really does build a better conceptual understanding of it, even if you are writing for nonspecialists. What I find frustrating is that I don't have time to write about everything I'd like to understand better!

  • Mailbag: What to read, for newbies

    Fri, 2012-09-28 08:06 -- John Hawks

    I don't usually front-page my mailbag entries, but I thought I would start doing it with a few: partly to remind myself to post them more often, and partly because some questions I really do get from a lot of readers, and I'd like to draw more attention to answers. Here's a recent e-mail:

    Hi Professor Hawks,

    I wondered if you could recommend any materials for people like myself who have a very limited knowledge of biological 'things'? I'm trying to 'prove' evolution as I must admit I 'see' design when I look at things like dna and how the cell works. I read a book by Ken Miller recently that presented a good case for evolution. He cited the example of the elephant and how the earliest 'kinds' of elephant were quite different physically to our modern elephant (smaller trunks and ears). I thought at the time, that this might only prove variation but not that the elephant was a different kind of animal. Dogs can vary wildly but are still dogs?? I wondered what main 'proofs' you would cite for evolution?

    One last question: is it possible to tinker with dna in say a chimp embryo and cause it to be more human? Sorry if that question is silly. This shows my ignorance. I'm supposing that now we have mapped our dna, we can reverse engineer back to say an ape? Couldn't a computer programme simulate this? If you programme in the chimp genome and the human genome and tell the computer to reverse engineer or forward engineer to meet each other? Is that a possibility? If yes, this would surely prove evolution.

    Many thanks in advance if you get the chance to reply. I'll understand if you don't.

    Have you looked at the book, Why Evolution Is True, by Jerry Coyne? It provides a very good account of some clear examples of evolution. Also, you may be interested in some of Carl Zimmer's work. His book, Evolution: The Triumph of an Idea is now a few years old but still a very good read. For a more rigorous treatment, he has a very readable textbook: The Tangled Bank: An Introduction to Evolution. I wouldn't usually recommend that my blog readers turn first to the level of an academic textbook, but this one is well-written for the general reader. His recent book on viruses is also very good.

    There's a book I often recommend to people without a lot of biology background because it shows the interdependence of organisms in nature; The Ghosts of Evolution: Nonsensical Fruit, Missing Partners, and Other Ecological Anachronisms by Connie Barlow, covers plants surviving today that depended upon now-extinct animals like mammoths and dodos. This one also makes an interesting gift for parents who are interested in biology and evolution, but not looking for an academic course on it.

    On your other question: In reality scientists can already "tinker" with the DNA of model organisms like mice in order to examine the function of particular genes. Already, there are many strains of mice who have been genetically engineered to express the human version of certain genes. However, doing this procedure on a very large scale, with many genes at a time, is presently not possible.

    Understanding the effects of one genetic change, or a handful of genetic changes, is very complicated. At the moment, science is not capable of simulating the effects of many genetic changes across a genome. This is the direction we are going, as we try to uncover biological networks and their workings.

    Good luck in your quest!

  • Unexpected "Radium Age" stories

    Sun, 2012-09-23 14:55 -- John Hawks

    I was enjoying a Nature discussion of "radium age" sci-fi literature, when this line caught me by surprise:

    In Jack London's post-apocalyptic The Scarlet Plague (1912), a race of barbarians descended from San Francisco's brutalized underclass roam the city's devastated remains after the fatal pandemic of 2013.

    Wait a minute, Jack London wrote a zombie story?

    Well, it's more Postman than zombies, but it's available on the Kindle for 99 cents: The Scarlet Plague (Annotated - Includes Essay and Biography). (UPDATE 2012-09-23: A reader notes that the story is also available for free from Project Gutenberg: http://www.gutenberg.org/ebooks/21970).

    Here's the description:

    The story takes place in 2073, sixty years after an uncontrollable epidemic, the Red Death, has depopulated the planet. James Howard Smith is one of the few survivors of the pre-plague era left alive in the San Francisco area, and as he realizes his time grows short, he tries to impart the value of knowledge and wisdom to his grandsons.

    They've apparently reverted to a Stone Age lifestyle, which does explain the Jack London element. I also love discovering that When the World Shook was written by H. Rider Haggard, better known for King Solomon's Mines.

  • Fifty paradigms of grey

    Sat, 2012-08-18 18:44 -- John Hawks

    The Guardian has a retrospective in honor of the fiftieth anniversary of publication of The Structure of Scientific Revolutions (and you can buy an anniversary edition: The Structure of Scientific Revolutions: 50th Anniversary Edition) "Thomas Kuhn: the man who changed the way the world looked at science"

    Kuhn remained at Harvard until 1956 and, having failed to get tenure, moved to the University of California at Berkeley where he wrote Structure… and was promoted to a professorship in 1961. The following year, the book was published by the University of Chicago Press. Despite the 172 pages of the first edition, Kuhn – in his characteristic, old-world scholarly style – always referred to it as a mere "sketch". He would doubtless have preferred to have written an 800-page doorstop.

    But in the event, the readability and relative brevity of the "sketch" was a key factor in its eventual success. Although the book was a slow starter, selling only 919 copies in 1962-3, by mid-1987 it had sold 650,000 copies and sales to date now stand at 1.4 million copies. For a cerebral work of this calibre, these are Harry Potter-scale numbers.

    The story is a good Sunday read. As far as Structure, Amazon tells me that customers who bought the new edition also were likely to buy The French Lieutenant's Woman.

  • What Technology Wants, apputated

    Sat, 2012-06-23 10:40 -- John Hawks

    On the ebook review site, Download the Universe, I have a new review of the app version of Kevin Kelly's book, What Technology Wants. The link to my review: "Telegraphing What Technology Wants".

    Sure, humans are coevolving with technology. We've done so now for more than two million years. Does that make technology-enabled humans into a "new kingdom of life"? That fundamentally misrepresents what a "kingdom" means in biology. Kelly argues for a much more deterministic view of evolution than biologists accept, and worries about an impending population crash. His beliefs in these cases are not without basis, but stripped down to mere theses they utterly fail to convince. Meanwhile, the section on the Amish -- so characteristic of Kelly's approach to understanding the social role of technology -- seems out of place here in the app. Its deeper overall context has been lost.

    So the app left me with a mental mismatch. As a reader who experienced both versions, I appreciated the synoptic view. It clarified my resistance to some of Kelly's ideas. Hopefully, many readers approaching the app for the first time will be motivated to investigate more deeply in the original book.

    I think Kelly's ideas about the nature of technological change deserve more critical attention from anthropologists, who seem to be sitting on their thumbs when it comes to technofuturism. We are adapted to technology, and we continue to change under its influence. That process of adaptation left castoffs, so that today's humans are a limited subset of our past potential. I happen to think that subset is a pretty good one, but as the process of adaptation continues, will that still remain true? Or will we recover lines of potentiality that may have appeared closed in the past?

  • New animal communication books

    Sat, 2012-04-07 17:49 -- John Hawks

    Anthropologist Barbara J. King reviews two new books on animal communication in the Washington Post: "'Calls Beyond Our Hearing: Unlocking the Secrets of Animal Hearing' by Holly Merino and 'The Song of the Ape : Understanding the Language of Chimpanzees' by Andrew R. Halloran".

    Meaning-making, though, isn’t necessarily language. Cetacean scientists in Canada remark that they can understand the vocal systems of beluga whales only by taking the animals’ cognition into account. But when Menino asks if the belugas are “doing something like comprehending language,” one scientist tells her flatly: “Nope. Not like language. You don’t even need to go there.”

    In “Song of the Ape,” Halloran, a primatologist, does go there. “I . . . feel confident,” he asserts, “in granting language to chimpanzees.”

    Interesting that these books are coming out this year. I update my animal communication notes every time I teach Biology of Mind, and for the past few iterations there has been strikingly little change. There are many more details to learn about how communication functions in different social species, but most recent developments have been to broaden the scope of known animal communication by showing well-understood communication strategies in new lineages of animals. How these strategies evolve -- often conversantly -- in both neural and social terms, is a key frontier of knowledge.

  • Reinventing discovery

    Sat, 2012-03-24 23:55 -- John Hawks

    Sabine Hossenfelder reviews a recent book by Michael Nielsen, Reinventing Discovery: The New Era of Networked Science.

    Collective intelligence, Michael argues, works by bringing together many people's "microexpertise," that is a specialized knowledge in a specific area. New software can tell them when their microexpertise is needed and where and how they can add their contribution. To that end, it is preferable if problems are brought into a modular structure, so that parts can be tackled independently. Suitable tools, some of which already exist, then allow scientists to scale up collaborations, helping them solve problems much faster, wasting less time and effort. These are exciting developments for every scientist that promise to make scientific research smoother, faster and less frustrating.

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Neandertals

For years, I've worked on their bones. Now I'm working on their genes. Read more about the science studying these ancient people.

Denisova

From a finger bone of an ancient human came the record of a completely unexpected population. My lab is working on the science of the Denisova genome.

Acceleration

The advent of agriculture caused natural selection to speed up greatly in humans. We're uncovering some of the ways that populations have rapidly changed during the last 10,000 years.

Malapa

Just outside Johannesburg, the Malapa site is producing some of the most exciting finds in human evolution. This site is the headquarters of the Malapa Soft Tissue Project.