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paleoanthropology, genetics and evolution

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  • Quote: Phillip Tobias on the study of race

    Thu, 2013-05-16 22:15 -- John Hawks

    I was doing research on another topic, and ran across an obituary of Phillip Tobias that I hadn't seen: "Phillip Tobias, SA's great scientist and human being, has gone back to earth". I thought this direct quote from Tobias worth sharing:

    In a society in which the question of race has come to loom as largely as it does in South Africa, there is, I believe, a positive duty on a scientist who has made a special study of race to make known the facts and the most highly confirmed hypotheses about race, whenever a suitable opportunity presents itself. I should be failing, therefore, in my academic duty, if I were to hold my peace and say nothing about race, simply because the scientific truth about race runs counter to some or all of the assumptions underlying or influencing the race policies of this country. In no field is the need of guidance from qualified scientists more imperative than in this very subject of race.

    The rest of the article is really good, as it describes both Tobias' work on fossil hominins and his activism against apartheid.

    Earlier: "Paleoanthropologist Phillip V. Tobias dies"

  • Quote: Morgan and Reynolds on ethics of plagiarism

    Fri, 2013-03-08 20:18 -- John Hawks

    Peter Morgan and Glenn Reynolds, from their book The Appearance of Impropriety: How the Ethics Wars Have Undermined American Government, Business, and Society (available online "Chapter Five: A Plague of Originality").

    In fact, appearance ethics not only fail to foster better behavior in those they govern, they also undermine the behavior of those who apply them. One of the chief appeals of appearance ethics to its enforcers (who include the corps of press and commentators) is that – much like reprinting press releases as news – judging appearances requires little knowledge of substance, allowing one to discuss the issues without the need for bothersome research or thought. Classical thinkers on ethical matters had a term for this tendency to avoid hard work. It was called laziness, and it was not considered a virtue. Another appeal of appearance ethics is that it provides something to talk about: when appearance ethics are the rule, even an unsubstantiated accusation can be said to create a bad appearance. Thus, even an unsubstantiated accusation provides grist for the mill of news flashes, op-eds, and talking-head shows.

    The classical term for this sort of behavior was malicious gossip and it, too, was not considered a virtue. This powerful appetite for accusations based on appearances itself encourages bad behavior: when the prevailing attitude is "where there’s smoke there’s fire" we should not be surprised to find a brisk trade in smudge-pots. This was known as temptation.

    That all of these human characteristics exist should come as no surprise. That they exist, by design, in an area dedicated to the improvement of ethics would have surprised classical thinkers. We should be concerned that it goes unremarked today.

    Seems apposite to recent discussions about ethics in anthropology. Self-proclaimed ethics defenders rely upon a widespread willingness to judge appearances, rather than do the hard work of engaging with evidence.

  • Quote: Google or existential searching

    Sun, 2013-01-13 23:55 -- John Hawks

    Nicholas Carr, beginning a post discussing the increasing role of Google not only in finding what we're looking for, but in anticipating the searches we haven't yet started (The searchers):

    When we talk about “searching” these days, we’re almost always talking about using Google to find something online. That’s quite a turn for a word that has always carried existential connotations, that has always been bound up in our sense of what it means to be conscious and alive. We don’t just search for car keys or missing socks. We search for truth and meaning, for love, for transcendence, for peace, for ourselves. To be human is to be a searcher.

  • Quote: Wallace on the distribution of beauty

    Thu, 2013-01-03 19:26 -- John Hawks

    In response to Darwin's claim that the British aristocracy has been made more beautiful "from pick of women", Alfred Russel Wallace replied (in a letter to Darwin written on 29 May 1864):

    I very much doubt the often repeated assertion that our aristocracy are more beautiful than the middle classes. I allow that they present specimens of the highest kind of beauty, but I doubt the average.

    I have noticed in country places a greater average amount of good looks among the middle classes, & besides we unavoidably combine in our idea of beauty, intellectual expression & refinement of manners, which often make the less appear the more beautiful. Mere physical beauty,—that is, a healthy & regular development of the body & features approaching to the mean or type of European man,—I believe is quite as frequent in one class of society as the other & much more frequent in rural districts than in cities.

    In addition to being an admirably Republican sentiment, Wallace's letter is an early statement of the idea that the average physical form is perceived as the most beautiful.

  • Quote: E. B. White on procrastination

    Tue, 2013-01-01 21:15 -- John Hawks

    The Paris Review interview of E. B. White has several good passages about writing. Here's one:

    Delay is natural to a writer. He is like a surfer—he bides his time, waits for the perfect wave on which to ride in. Delay is instinctive with him. He waits for the surge (of emotion? of strength? of courage?) that will carry him along. I have no warm-up exercises, other than to take an occasional drink. I am apt to let something simmer for a while in my mind before trying to put it into words. I walk around, straightening pictures on the wall, rugs on the floor—as though not until everything in the world was lined up and perfectly true could anybody reasonably expect me to set a word down on paper.

    (via Brain Pickings)

  • Quote: Heinlein on specialization

    Sun, 2012-12-09 21:30 -- John Hawks

    Robert A. Heinlein, in The Notebooks of Lazarus Long:

    A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.

  • Quote: Jerry Pournelle on science writing

    Sun, 2012-11-25 15:46 -- John Hawks

    Jerry Pournelle, in A Step Farther Out ($2.99 on Kindle):

    Science writers have a problem; how much detail do we include, and how technical can we get? After all, our first purpose is to entertain; if we can't do that, there's no point in writing a column or article for the general public. On the other hand, there's buried in most of us a frustrated teacher: we want the readers to understand and even to be able to work these things out for themselves.

  • Quote: H.G. Wells on lacunar reading

    Tue, 2012-11-20 20:21 -- John Hawks

    From the preface of Mankind in the Making, by H. G. Wells:

    It is a work that the writer admits he has undertaken primarily for his own mental comfort. He is remarkably not qualified to assume an authoritative tone in these matters, and he is acutely aware of the many defects in detailed knowledge, in temper, and in training these papers collectively display. He is aware that at such points, for example, as the reference to authorities in the chapter on the biological problem, and to books in the educational chapter, the lacunar quality of his reading and knowledge is only too evident; to fill in and complete his design—notably in the fourth paper—he has had quite frankly to jerry-build here and there. Nevertheless, he ventures to publish this book.

  • Quote: Bérubé and the Boas Bowl

    Mon, 2012-10-15 15:12 -- John Hawks

    Michael Bérubé writes in the Chronicle of Higher Education: "Why I Resigned the Paterno Chair", with a discussion of academics versus athletics. I'm linking because of this:

    The day thousands of alumni cheer "We are Penn State" in celebration of the fact that the anthropology department is No. 1 nationally (having defeated Duke in the prestigious Boas Bowl) will be the day we know we've changed the culture in Happy Valley.

    Somehow I don't see it happening, although a Boas Bowl would be entertaining.

  • Quote: Haldane on detecting variation in fitness

    Sat, 2012-09-29 22:27 -- John Hawks

    In a 1937 paper [1], J. B. S. Haldane covered some aspects of the evolutionary process in a particularly clear way. Not everything in the following paragraphs is correct or uncontroversial today, but Haldane gives a clear exposition of the power of small differences on an geological timescale:

    On the other hand, the evolutionary process is exceedingly slow. Forms usually change little in 100,000 years. Now Haldane (1924) showed that a dominant character causing an increase of 0.1 per cent. in the fitness of its carriers would increase from a frequency of .001 per cent. to one of 99 per cent. in a random mating population in 23,400 generations, and somewhat more rapidly in an inbred population; in fact, on a geological time scale, almost explosively. But a difference in fitness of this magnitude could not be detected. In order that an observed viability difference of 0.1 per cent. should exceed twice its standard error, we should have to observe at least sixteen million individuals. To detect so small a difference in fertility we should have to count their progeny.

    It may be possible to observe evolution by natural selection in a species which is adapting itself to a new environment. In other cases we can very rarely hope to notice evolutionary changes within a human lifetime. From the standpoint of an individual human observer species may be regarded as almost in equilibrium. Our only reason to hope for observable evolution is that owing to glaciation, agriculture, fishing and industry, the balance of nature has recently been upset in a manner probably without precedent in our planet's history; and hence on the Darwinian theory we should expect that evolution was proceeding with extreme and abnormal speed.

    Every so often as I'm reading classic pieces in population genetics, I look for statements that anticipate our recent observation that human evolution has accelerated during the last few thousand years. Haldane's comments on rapidly changing environments are among the first I've noticed along these lines, of course they pertain not to humans but to other possible examples of evolution in the natural environment.


    References

    1. Haldane JBS. The Effect of Variation of Fitness. The American Naturalist [Internet]. 1937;71:pp. 337-349. Available from: http://www.jstor.org/stable/2457289

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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.