Meet Ardipithecus: the newest/oldest member of our family

The current issue of Science introduces us to our oldest known ancestor: Ardipithecus. Coming only after fifteen years of meticulous research by Tim White and his team, this announcement is a cause for celebration for those of us who treasure hard-earned evidence-based knowledge. At Daily Dish, though, Andrew Sullivan introduces Ardipithecus with a disclaimer: "If by any chance you are a fundamentalist Christian, skip this post. You can't handle the truth." I haven't yet received the issue of Science featuring Ardipithecus, but I am very much on the lookout. In the meantime, Karl Zimmer of The Loom offers a highly readable overview of the newly released findings:

Ardipithecus’s feet were mosaics too. The four little toes were adapted for walking on the ground. Yet the big toe was still opposable, much like our thumbs. This sort of big toe helped Ardipithecus move through the trees much more adeptly than Lucy. But Ardipithecus could not climb through trees as well as, say, chimpanzees. Chimpanzees have lots of adaptations in their arms and shoulders to let them hang from branches and climb vertically up trees with incredible speed. Ardipithecus had hands were not stiffened enough to let them move like chimpanzees. Ardipithecus probably moved carefully through the trees, using its hands and feet all at once to grip branches.

It's not every day that we push back one-million years further regarding our understanding of our ancestry. This is an extraordinary discovery by Tim White (who was also part of the time who uncovered "Lucy" (Australopithecus afarensis) in the early 1970's. Today, I will revel in the thought that, more than four million years ago, our tree-crawling ancestors were living valiantly and carefully enough to pass on their genes so that we modern house-dwelling (and car-dwelling) humans could scientifically contemplate their way of life. It is all so very bracing . . .

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Daniel Dennet discusses “The Computational Perspective” to evolution

Edge.org recently posted Daniel Dennett's discussion of "The Computational Perspective." At the linked site, you'll find the video of Dennett's lecture, along with Dennett's PowerPoint slides. Dennett's focus was whether things that are more complex can result from less complex things. Dennett assures us that the answer is yes, and that this is exactly what Darwin demonstrated. darwin-insight-we-dont-need-to-know-how-to-make-machines This same principle was demonstrated by Alan Turing: turing-insight The net result is "competency without comprehension." For the second half of his talk, Dennett applied this same principle to the magnificent aspects of human culture, including the words of our languages, which have "tremendous replicative power." culture Dennet concludes that humans are the effect of the purposes of life, not the causes. We tend to project our views back onto nature, and we have the capacity to "discover the reasons everywhere in the tree of life." Looking forward, we are also "the first intelligent designers of the Tree of Life." At the this same page at Edge.org, you can also view 45-minute lectures regarding evolution by Alvaro Fischer, Leda Cosmides, John Tooby, Steven Pinker, Matt Ridley, Helena Cronin, Nicholas Humhrey, Ian McEwan.

Continue ReadingDaniel Dennet discusses “The Computational Perspective” to evolution

History of Thrifty

If you want to study the history of thriftiness (and the lack thereof), check out "Saving Yourself," an article by Daniel Akst that appears in the Wilson Quarterly. One of the key figures in Akst's article is Thorstein Veblen:

Thorstein Veblen, the peripatetic Norwegian-American economist (he died in 1929, shortly before the great crash that might have brought him grim satisfaction), is best known today for his theory of conspicuous consumption, which argued that a lot of spending is just a wasteful attempt to impress. In effect, Veblen explained consumerism in terms of status and display, bringing evolutionary ideas to bear on economics and consumer behavior to powerful effect. Reading Veblen is a little like reading Freud or Darwin, albeit on a smaller scale: Do so and you’ll never look at the world in quite the same way again. As you might imagine, the iconoclastic Veblen took a dim view of all the conspicuous consumption around him, regarding it as a species of giant potlatch in which competitive waste had run amok. You might call Veblen’s the voice of thrift, and it is still heard today from leftist intellectuals who, from their tenured pulpits and Arts and Crafts homes, reliably denounce the spending of others. The truth is that nobody listens to these people, except to submit to their periodic floggings as a kind of penance for sins we have no intention of ceasing.
Where are we now? Akst points out some good news:
Conspicuous consumption, like tobacco, has fallen into social disrepute, a change that removes some of the pressure felt by many families to keep up with the Joneses (who may well have been foreclosed by now).
Akst ends his article with lots of avuncular advice on surviving our current and future materialist downsizing. A lifetime thrifty person, Akst is not pessimistic: "Thrift is far from the worst thing we can have thrust upon us."

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Excuse me . . . my mortality is showing: meditations on life and death

Have you ever wondered why so many Americans wear clothing when it's warm outside? Are they really covering up for sexual propriety—because of shame? Or could it be that they are wearing clothes to cover up their animal-ness-- their mortality? I'm intrigued by this issue, as you can tell from my previous writings, including my posts about "terror management theory," and nipples. This issue came to mind again recently when I found a website that allows you to completely undress people. The site has nothing to do with sex, I can assure you, but it has a powerful set of images that raise interesting questions about human nakedness. To get the full experience, go to the website and select an image of a fully clothed person. These are absolutely ordinary looking people, as you will see. Then click on the images of any of these men or women and watch their clothes disappear. If you are like me, when their clothing disappears, this will not cause you to any think sexual thoughts. If you are like me, you will find yourself thinking that these people looked more "attractive" with their clothes on. For me, the effect is dramatic and immediate, and it reminded me of a comment by Sigmund Freud (I wasn't able to dig out the quote), something to the effect that we are constantly and intensely attracted to the idea of sex (duh!), but that sex organs themselves often look rather strange to our eyes--sex organs are not necessarily sexy. I think the same thing can be said for our entire bodies. Nakedness isn’t the same thing as sexuality or else nudist colonies would tend to be orgies (which, from what I’ve read, they are not). Rather, sexual feelings are triggered by the way we use our bodies. We do many things that are sexual, and most of these things take some effort. Simply being naked is not an effective way to be sexy. In America, people constantly confound nudity with sexuality. I admit that the media presents us with many ravishing image of sexy naked people, but the sexiness of such images is not due to the mere nakedness. There’s always a lot more going on than mere nakedness. Consider also, that when people actually mate, they often bring the lights down low, further hiding their bodies. Then why do Westerners cover up with clothing to be "proper"? I suspect that anxiety about death (not so much anxiety about sex) contributes to our widespread practice of hiding those naturally furry parts of our bodies—those parts associated with critically "animal" functions relating to reproduction and excretion of body wastes. [More . . .]

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What’s up?

I mean, truly, what's up? How about this incredible NASA photo of the Milky Way taken by the Spitzer infrared telescope. We live in quite an amazing neighborhood. Image: NASA But there are other things that are up closer to home. I caught both of these images yesterday. First of all, a sky-full of clouds, as a storm was gathering . . . Image by Erich Vieth . . . which ended up with this rainbow, right over my house. A sign of good luck, assume . . . Image by Erich Vieth

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