john hawks weblog

paleoanthropology, genetics and evolution

profiles

  • Profile of Deborah Blum

    Sat, 2013-04-27 11:04 -- John Hawks

    The Guardian interviews my University of Wisconsin-Madison colleague and friend, Deborah Blum, on what inspires her to write about science: "Deborah Blum on science writing: I'm a neurotic over-researcher".

    Or to give you another, more recent example, consider the complex chemistry and biology of plants. It sounds like a dust-dry topic but I love being able to demonstrate that it's wholly fascinating. So stories about plants run like a theme through my Wired blog: the chemical reasons that chocolate is poisonous to dogs, the way that rice plants have an affinity for arsenic, for instance. Or the surprising way that grass – plain old grass in a Texas field – can in conditions of stress, actually generate hydrogen cyanide and kill cattle.

    The grass story reminds me of a point that the 19th century psychologist-philosopher William James liked to make. What science shows us, time and time again, is that the real world is a fantastical, wonderful, impossibly complicated piece of work and "nature is everywhere gothic". When I'm aiming high, I like the idea of being a kind of "gothic science writer" in the best Jamesian sense!

    It's a great interview with many useful thoughts about how to take your writing to a higher level of interest and depth.

  • "We're not, as a whole, introspective"

    Sun, 2012-09-09 11:04 -- John Hawks

    The Guardian has a profile of the "inventor of the pill", who in his later years has turned to fiction as a novelist and playwright: "Carl Djerassi: 'Scientists aren't just Frankensteins or Strangeloves or nerds'".

    The piece fits with my recurring writing topic of science in art, and Djerassi's voice is unique:

    Above all, he's interested in describing what he calls the "tribal behaviour" of scientists – and he's critical of the scientific community for being reluctant to explain that behaviour to the outside world. "I'm a member of that tribe," he says, "and it's a tribe that does not advertise its behaviour – not because they want to keep it secret, but because they're not interested in discussing it. We're not, as a whole, introspective, because we're so focused on what we're doing. But it means that people outside science have a very limited idea about who we really are, and how we think."

  • Dorothy Garrod remembrance

    Mon, 2012-06-18 12:11 -- John Hawks

    Cambridge has produced an article about the accomplishments of archaeologist Dorothy Garrod, the first female professor in the institution: "The groundbreaking female archaeologist".

    Fingers drummed, heads scratched, because for all the university’s failings on sexual equality, they were eager to have her.

    The solution?

    “They turned her into a man,” hoots Dr Pamela Jane Smith, a research fellow at the McDonald Institute for Archaeological Research at Cambridge, a 68-year-old academic whose PhD thesis resurrected Garrod’s accomplishments from the dusty folds of history.

    Garrod is remembered in paleoanthropology as the excavator of Skhul and Tabun, along with many other important sites.

  • Richard Leakey profile

    Sat, 2012-05-26 15:32 -- John Hawks

    The Associated Press profiles Richard Leakey: "Scientist: Evolution debate will soon be history". The article gives a bit of Leakey's biography and discusses how he came to join the faculty at Stony Brook University and his current fundraising efforts for the Turkana Basin Institute. The "evolution debate" quote comes from the interview:

    "If you don't like the word evolution, I don't care what you call it, but life has changed. You can lay out all the fossils that have been collected and establish lineages that even a fool could work up. So the question is why, how does this happen? It's not covered by Genesis. There's no explanation for this change going back 500 million years in any book I've read from the lips of any God."

  • No paradigm will suffice

    Thu, 2012-05-24 09:10 -- John Hawks

    John Horgan reminisces about his experience interviewing the philosopher of science Thomas Kuhn: "What Thomas Kuhn really thought about 'scientific truth'". He includes a long excerpt from his book, The End of Science, and the post is a useful review. The final paragraph got me thinking:

    At the end of Structure, Kuhn briefly raised the question of why some fields of science converge on a paradigm while others, art-like, remain in a state of constant flux. The answer, he implied, was a matter of choice; scientists within certain fields were simply unwilling to commit themselves to a single paradigm. I suspect Kuhn avoided pursuing this issue further because he could not abide the answer. Some fields, such as economics and other social sciences, never adhere to a paradigm because they address questions for which no paradigm will suffice.

    As I'm reviewing the history of anthropological theory over the next few weeks, I'll be reflecting on how the mode of interpretation has changed over time. Obviously, biological anthropology follows the methodological trends in biology -- we are in many ways more evolution-oriented than most biologists are, although major innovations like the New Synthesis were only slowly taken up by midcentury biological anthropologists who worked within a typological framework.

    Within cultural anthropology and sociology, I also think there have been several fairly well-defined methodological and theoretical paradigms. What seems different is that "revolutionaries" are much more common, and more commonly listened to, in these fields. These fields don't throw out bad ideas, they keep all the bad ideas in a cupboard where they can be pulled out and recombined in the service of theory-building.

  • Spielke profile

    Sat, 2012-05-05 12:25 -- John Hawks

    The New York Times has a long profile of developmental psychologist Elizabeth Spielke, whose work with babies has opened a window on early cognition ("Insights from the youngest minds"). The article is wide-ranging and worth sharing. I thought I'd make an note of Spielke's version of the "cathedral" model in which distinct cognitive functions are combined by executive consciousness into synthetic abilities. She denotes language as the functional glue holding the brain's abilities together:

    Dr. Spelke is also seeking to understand how the core domains of the human mind interact to yield our uniquely restless and creative intelligence — able to master calculus, probe the cosmos and play a Bach toccata as no bonobo or New Caledonian crow can. Even though “our core systems are fundamental yet limited,” as she put it, “we manage to get beyond them.”

    Dr. Spelke has proposed that human language is the secret ingredient, the cognitive catalyst that allows our numeric, architectonic and social modules to join forces, swap ideas and take us to far horizons. “What’s special about language is its productive combinatorial power,” she said. “We can use it to combine anything with anything.”

    She's in a position to test that by looking at prelinguistic children. I think there's much truth in the idea, but some functional integration must take place in any conscious organism, even without language. Language allows a complexity of expression, but complexity does not necessarily mean integration.

  • Sarah Blaffer Hrdy interview

    Sat, 2012-03-17 19:53 -- John Hawks

    Eric Michael Johnson has posted a wonderful and wide-ranging interview with Sarah Blaffer Hrdy: "Raising Darwin’s Consciousness: Sarah Blaffer Hrdy on the Evolutionary Lessons of Motherhood".

    The balance of my life did not feel right. Furthermore, the state of my field was such that teaching in an anthropology department was not bringing me a whole lot of satisfaction. It’s so hard to talk about it and tell the truth because there were so many different angles to it. But, basically, I wrote a book proposal, submitted it to publishers, there was an auction, the book was sold, and I immediately resigned from the university. I was offered to take the status of Professor Emerita, which I thought was an attractive offer. It didn’t come with any pension or medical benefits but, because my work had been so controversial, it was a way for me to quit with dignity. So that’s what I did.

  • Chris Henshilwood profile

    Tue, 2012-02-28 18:16 -- John Hawks

    Nature News has an article written by Jeff Tollefson, which profiles archaeologist Chris Henshilwood and his work at Blombos, South Africa: "Human evolution: Cultural roots".

    Most fascinating line, regarding his early exploration at Blombos:

    The Middle Stone Age was not part of his thesis, so Henshilwood covered the site up and moved on.

    That's sadly symptomatic of archaeological funding.

    Henshilwood has made a great career out of the MSA since then, as the article details. Now lots of money is flowing into interdisciplinary research trying to tie African MSA to paleoclimate. The article details some of those developments also.

  • Rick Potts interview

    Fri, 2012-02-24 23:58 -- John Hawks

    Discover magazine has interviewed Smithsonian paleoanthropologist Rick Potts, featured in a special "evolution" issue "How We Won the Hominid Wars, and All the Others Died Out". Potts is well-known for his emphasis on past environments and climate variability in forcing human evolutionary adaptations. The interview goes over these topics and spends some time considering why humans are the "only survivor" of a past diversity of hominin species. A sample:

    In one of your essays, you ask the question “Are we it?”—are we the final blossom of the human flower? What is your answer?

    Actually, my answer to “Are we it?” is to turn the assumption on its head. Considering that we are the only survivor of a diverse family tree—that is, an evolutionary tree characterized by lots of extinction—the notion that our twig is the final blossom of evolution is incredibly outdated. It’s incorrect no matter how ingrained it is in our thinking. Our amazing adaptability has allowed us to shape the environment to our own needs. This transformation has taken place in a remarkable period of climate stability, over the past 8,000 years or so. One deeply ironic result is that we have now narrowed our own options at a time when climate fluctuation appears to be increasing. Of an estimated 15,000 species of mammals and birds, fewer than 14 account for 90 percent of what we eat. Of more than 10,000 edible plants, three crops—wheat, rice, and corn—provide half the world’s calories. And through greenhouse gases released by burning fossil fuels, we’re pulling on the strings of the earth’s unstable climate.

    I had to face that issue of "only survivors" recently in a review. Clearly that means something very different now that we know people have a diversity of ancestors among Neandertals, Denisovans, and other archaic populations in Africa.

  • “He had a sufficiently high opinion of himself"

    Tue, 2012-01-03 23:20 -- John Hawks

    Gina Kolata profiles Eric Lander, director of Harvard and MIT's Broad Institute and advisor to President Obama, in the New York Times. It's a good read for those interested in the recent history of genetics, and where it may be going from the perspective of one of the largest sequencing centers.

    I also learned a lot from the descriptions of Lander in Jamie Shreeve's recent book, The Genome War: How Craig Venter Tried to Capture the Code of Life and Save the World. I really enjoyed the book, and if I have time I'll do a full review.

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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.