Diminishing races, growing family

In the January 22, and 2009 edition of Nature (available only to subscribers online), Aravinda Chakravarti explains that our simplistic notions of "population" and "race" will need to be revised as we enter the age of "personal genomics." Chakravarti teaches at the Johns Hopkins University School of Medicine. Traditionally, we've used geological records to trace our family histories. We are now approaching a time where we will be able to use DNA databases. Whereas our traditional human records take us back several hundred years, our genomes will allow us to explore our ancestry for hundreds of thousands of years. Chakravarti argues that we will be entering unknown territory riddled with surprises and stretching the meaning of the word "family." How close knit is our human "family"?

All living humans are related via a set of common ancestors who lived in Africa about 200,000 years ago. Other studies have since shown that the world beyond Africa was settled even more recently. From 100,000 years ago, descendants of our African forebears spread out to populate other continents . . . the striking implication of this is that all living humans are mosaics with ancestry from the many parts of the globe through which our ancestors trekked. In other words, each of us has around 6.7 billion relatives.

Chakravarti points out that our genealogy-based record-keeping is often riddled with error. It fails to indicate our interrelatedness to each and every other human being, for example. Further, evidence shows that at least one out of 20 people do not know the identity of their genetic father. Thanks to the falling cost of examining entire human genomes (Chakravarti indicates that it has fallen 1000- fold or more), we now have abilities we could only have dreamed of a few decades ago. Personal genomics might well destroy our simplistic notion of "race." Human populations are not intact groups. There is no such thing as genetically characterized racial categories. We are all "multiracial, related to each other only to a greater or lesser extent." Detailed surveys are making it clear that there is no such thing as a discrete racial group. Rather, it is clear that there is a "continuity in variation across the globe, not abrupt transitions between population-specific sequence patterns." Personal genomics would allow us to focus on individual human beings, instead of artificially constructed "racial" populations.

Genome-wide studies ... could result in the individual identity and kinship coming to define populations rather than the other way around. We could test once and for all whether genetic race is a credible concept. This would be tremendously exciting. It is bound to stir up our deeply held notions of who we are, where we came from, our history and thus our politics. .. . it may be time for science to reshape the views of society. By dismantling our notions of race and population, we may better appreciate our common shared and recent history and perhaps more importantly our shared future.

I recently posted on the topic of whether science should study race and intelligence. I think this would be a worthy topic of science (just as is every other potential field of study), but I warned that our current definition of "race" is horribly muddled. We need to get clear on this term, if that is even possible. I found Chakravarti's article to be a refreshing reminder that there might not even be a worthy scientific definition of "race." In fact, it might well be that, once we look carefully at the evidence, we will find that there are actually 6.7 billion "races" out there. Or is it more accurate to conclude that there is only one human race?

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Educational Ruins

Anyone who has actually visited and studied ruins knows that they are created from orderly structures by a particular combination of forces. First comes neglect, when people either lose appreciation for the value of the thing and stop maintaining it, or they simply abandon it. Next comes vandalism, when people actively damage the structure to scavenge materials and souvenirs, to leave their own mark, or to intentionally destroy it. The latter is usually for religious reasons, as in purging earlier figureheads like Hatshepsut, Trotsky or the Bamiyan Buddhas. But this post is about an institutional edifice. Education in the United States is falling into ruins. Sure, it still is funded in a nominal sort of way. But people have forgotten its value. They even vote against tax increases necessary to maintain current standards. Schools are closing; one K-12 building in my neighborhood is now condos. My Junior High school was razed for a housing development. Pharyngula points out how the University of Florida is now planning to shut down its geology department as a cost cutting measure. Geology is the science that gave Darwin the leg up to understand how natural selection works before anyone else. Geology and its understanding affects meteorology, biology, sociology, history, exo-planetary studies, and more. Florida is one of the states in which regular attempts are made to insert Creationism into school itineraries. And geology is the biggest stumbling block to accepting a Young Earth. But I hope that is not their underlying reason. It is simple neglect of education in general. But there is a strong vanadlism movement afoot in this country. Anti-science forces are working hard to put non-scientific ideas into science classes. Texas is a recurring battleground as school administrators attempt to keep up education credentials in spite of the onslaught. Recently, a doomed law is running the gauntlet in the Texas legislature to allow unaccreditable private schools to offer advanced degrees. See Hank's A Master’s in Creationism. If that seemed too harsh, try Pharyngula's If you fail an IQ test in Texas, do they automatically put you in the legislature? Hank is Australian. Yet he cares about how this sort of behavior is making the United States seem ever goofier. To let our once-admirable education system crumble is a step backwards for the world.

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Flooded With Data

I had an urge to think through some implications of a world-wide flood, such as the one Biblical Literalists claim happened a few thousand years ago. Let's suppose that it happened, that the entire world was inundated all at once to cover the highest mountain, and that all surviving land animals and short-range birds were preserved in a single boat. What would the ecological landscape look like? gray worldFirst, all land animals would only be found on a single connected land mass. There is no way that any crawling creature could have reached Australia or the Americas from the Middle East. Most especially tropical animals. Secondly, we expect to see floral panspermia. That is, the waters would have carried every species of seed to every land mass all at once. Vanilla and cocoa and peppercorns should all be found growing in the same places throughout human history. Same for and chile peppers and coffee and potatoes. Wheat and maize should also be seen as combined staples of every ancient diet. Or the opposite: The flood waters killed off all the seeds except what was carried on the ark. Therefore, only the plants found in the middle east could exist anywhere in the world. Also, all modern animal species should be represented in every geological flood stratum. After all, a single massive drowning event doesn't distinguish between creatures of comparable size like an allosaur and an elephant or a trilobite and a mouse. Surely there must be abundant examples of these combined fossils. So it is easy to prove that such a flood actually happened. In fact, it must have been proven beyond a shadow of a doubt when Europeans first sailed to the Americas and found everything there to be just the same as back home.

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A Master’s in Creationism

LOL*cough* Excuse me. I nearly choked on a handful of almonds. My created/intelligently designed oesophagus is just a little too close to my trachaea, making it very easy to block the latter with particles of chewed food whilst laughing my arse right off its hinges when I read stuff like this FOX article:

State Rep. Leo Berman (R-Tyler) proposed House Bill 2800 when he learned that The Institute for Creation Research (ICR), a private institution that specializes in the education and research of biblical creationism, was not able to receive a certificate of authority from Texas' Higher Education Coordinating Board to grant Master of Science degrees.
So. "Education" and "research" (grin) of biblical creationism (chortle). OK, well, although I'm no theologian or creation scientist (snort) , allow me to sum up the entire proposed course for you: Education: God did it. Research: it says in the Bible that God did it. Thesis: the Bible says God did it; the Bible is always right because God wrote it; God is always right; the evidence for this is in the Bible which God wrote; my conclusion is that God did it (and is always right, just like the book He wrote). Well done, here's your diploma & whimsical "WWJD" t-shirt that all the kids are wearing. That'll be several thousand dollars. Hmm?

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