Category Archives: Science

Bang bang, you’re alive

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A new theory in cosmology sounds much like the Hindu, Jain and Buddhist concepts of cyclical creation and mind-boggling timescales. I don’t mean to sound like Religious Uncle, rather to evoke a neat coincidence (via Slashdot):

The universe is at least 986 billion years older than physicists thoughtThe universe may be 986 billion years older than previously thought, and creation may be cyclical and is probably much older still, according to a radical new theory. The revolutionary study suggests that time did not begin with the big bang 14 billion years ago…

The standard big bang theory says the universe began with a massive explosion, but the new theory suggests it is a cyclic event that consists of repeating big bangs and big crunches – where every particle of matter collapses together…

“I think it is much more likely to be far older than a trillion years though,” said Prof Turok. “There doesn’t have to be a beginning of time. According to our theory, the universe may be infinitely old and infinitely large…” [Link]

… According to Steinhardt and Turok, today’s universe is part of an endless cycle of big bangs and big crunches, with each cycle lasting about a trillion years. At every big bang, the amount of matter and radiation in the universe is reset, but the cosmological constant is not. Instead, the cosmological constant gradually diminishes over many cycles to the small value observed today… the cosmological constant decreases in steps, through a series of quantum transitions. [Link]

As I’ve noted before, the Hindu concept of time is so over-the-top that it beats even the Chinese long view quoted sanctimoniously by bestsellers on the business shelves:

… the life cycle of Brahma is… 311 trillion years. We are currently in the 51st year of the present Brahma and so about 155 trillion years have elapsed… [Link]
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Root canals sucked even worse back then

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Via our newsline we see that Thursday’s issue of the journal Nature has a paper out which indicates that dentistry may be one of the world’s oldest professions. The paper, which has an Italian as the lead author, is titled Early Neolithic Tradition of Dentistry (paid subscription required). Now when we are old uncles/aunties we can brag to our children that South Asians invented denistry also.

Proving prehistoric man’s ingenuity and ability to withstand and inflict excruciating pain, researchers have found that dental drilling dates back 9,000 years.

Primitive dentists drilled nearly perfect holes into live but undoubtedly unhappy patients between 5500 B.C. and 7000 B.C., an article in Thursday’s journal Nature reports. Researchers carbon-dated at least nine skulls with 11 drill holes found in a Pakistan graveyard.

That means dentistry is at least 4,000 years older than first thought — and far older than the useful invention of anesthesia.

This was no mere tooth tinkering. The drilled teeth found in the graveyard were hard-to-reach molars. And in at least one instance, the ancient dentist managed to drill a hole in the inside back end of a tooth, boring out toward the front of the mouth. [Link]

My whole life I had looked down on people with multiple cavities because I had never had one. I usually snubbed these “enamelly challenged” because I saw them as being weak and unable to resist candy. I got my just desserts though. Last year I got my first (and I swear it will be my last) cavity. By the time the doctor was done she had pulled two of my innocent teeth just to get to the offending tooth which she then reconstructed with a crown. My wisdom teeth surgery was even worse (warning: NSDL). Apparently they were like upside down. I can’t even begin to imagine how people were able to withstand the pain in the Neolithic.

The site of Mehrgarh in Baluchistan lies along the principal route connecting Afghanistan to the Indus valley. After intermittent occupations by hunter-gatherers, Mehrgarh’s subsistence economy shifted to the cultivation of barley and wheat, cotton domestication and cattle breeding. Diachronic archaeological evidence records an increasingly rich cultural life, with technological sophistication based on diverse raw materials. Excavation of the Neolithic cemetery known as MR3 yielded more than 300 graves created over a 1,500-year time span…

Whatever the purpose, tooth drilling on individuals buried at MR3 continued for about 1,500 years, indicating that dental manipulation was a persistent custom. After 6,500 yr BP, the practice must have ceased, as there is no evidence of tooth drilling from the subsequent MR2 Chalcolithic cemetery, despite the continuation of poor dental health. [Link]

Teeth are the greatest find in any paleontological/archeological expedition. Measuring istope ratios can even tell you what the people ate. I keep two of my old teeth on my desk at home. This is just in case my body is lost during some adventure and someone wants to learn about my lifestyle when I was still alive.

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It’s Raining (Little Green) Men

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Red rain is coming down…
Red rain is pouring down
Pouring down all over me…

— Peter Gabriel, ‘Red Rain’

In 2001, Kerala residents heard a sonic boom in the sky followed by two months of mysterious red rain. A physicist in Kerala took samples of the downpour and found what looked like cells without DNA. He believes that the material came from a meteor which exploded while aloft and speculates that the specimens were aliens hitching a panspermic ride. He’s pretty sure they aren’t red earth in pouring rain (thanks, masale.wallah):

On 25 July, 2001, blood-red rain fell over the Kerala district of western India. And these rain bursts continued for the next two months. All along the coast it rained crimson, turning local people’s clothes pink, burning leaves on trees and falling as scarlet sheets at some points.

Investigations suggested the rain was red because winds had swept up dust from Arabia and dumped it on Kerala. But Godfrey Louis, a physicist at Mahatma Gandhi University in Kottayam, after gathering samples left over from the rains, concluded this was nonsense. ‘If you look at these particles under a microscope, you can see they are not dust, they have a clear biological appearance.’ Instead Louis decided that the rain was made up of bacteria-like material that had been swept to Earth from a passing comet. In short, it rained aliens over India during the summer of 2001…

Dr. Godfrey Louis has just released these magnified images of the cells in a new paper in Astrophysics and Space Science (via Digg).

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Bubble bubble, toil and trouble

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A new story in Nature reiterates that an Indian-American nuclear scientist’s claims of tabletop fusion are suspect (thanks, Saheli):

Dr. Rusi Taleyarkhan

Several Purdue researchers said Rusi Taleyarkhan, a Purdue professor of nuclear engineering, has stymied their attempts to verify or refute aspects of his controversial “bubble fusion” experiments since late 2003, when he joined Purdue’s faculty. In an article published online Wednesday in the journal Nature, they said their confidence in his work at Purdue and previously at Oak Ridge National Laboratory in Tennessee has been seriously shaken…

Seth Putterman, a professor of physics at the University of California, Los Angeles, who received a $350,000 grant from the Defense Department to try to reproduce Taleyarkhan’s findings, said he has been unable to do so. [Link]

In February 2005, the BBC commissioned a collaboration between Seth Putterman and Ken Suslick (two leading sonoluminescence researchers) to reproduce Taleyarkhan’s work. Using similar acoustic parameters, deuterated acetone, similar bubble nucleation, and a much more sophisticated neutron detection device, the researchers could find no evidence of a fusion reaction. This work was reviewed by a team of four scientists, including an expert in sonoluminescence and an expert in neutron detection, who also concluded that no evidence of fusion could be observed. [Link]

Taleyarkhan’s paper had skeptics from the beginning — this excerpt is from 2002:

However, many scientists remain sceptical of the results reported by Rusi Taleyarkhan and his colleagues at Oak Ridge National Laboratory in Tennessee, including other researchers at ORNL who tried and failed to repeat the experiments.

The second ORNL team say they used a more sophisticated detection system. But team member Mike Saltmarsh says: “Our experiment saw no evidence for nuclear fusion. This does not prove that no nuclear fusion is going on – it’s virtually impossible to prove a negative – but it does show that if it exists, it is at a very low level…” [Link]

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Could the Kennewick Man have been South Asian?

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You have all most likely heard of the Kennewick Man:

In 1996, there was a boat race on the Columbia River, near Kennewick, in Washington State, in the extreme northwestern United States. Two fans pulled ashore to get a good viewpoint of the race, and, in the shallow water at the edge of the bank, they found a human skull. They took the skull to the county coroner, who passed it to archaeologist James Chatters. Chatters and others went to the Columbia and retrieved a nearly complete human skeleton, with a long, narrow face suggestive of a person of European descent. But the skeleton was confusing to Chatters; he noticed that the teeth had no cavities and for a 40-50 year old man (the most recent studies suggest he was in his thirties), the teeth were extremely ground down. Cavities are the result of a corn-based (or sugar-enhanced) diet; grinding damage usually results from grit in the diet. Most modern people don’t have grit in their food, but do consume sugar in some form and so do have cavities. And Chatters spotted a projectile point embedded in his right pelvis, a Cascade point, normally dated between 5,000 and 9,000 years before the present. It was clear that the point had been there while the individual was alive; the lesion in the bone had partially healed. Chatters sent off a bit of the bone to be radiocarbon dated. Imagine his astonishment when he received the radiocarbon date as over 9,000 years ago. [Link]

The cover of Time Magazine this week is dedicated to new discoveries about the Kennewick Man reported inside. For many years his remains were the subject of a heated court battle. Native Americans claimed that they had the right to reclaim and bury his remains (thereby preventing scientific study) because he was one of their own. The Time Magazine article (subscription currently required) explains how forensics reveals that the Kennewick Man was not racially what we would consider Native American, but rather Polynesian or Ainu. He therefore predates existing Native American tribes. Indolink.com takes it a step further and includes speculation that he may have been from South Asia. It gets tricky because some people use “South Asia” when they really mean “Southeast Asia”:

Now it appears that analysis of Kennewick Man, places him “closer to southern Asians and nearly equidistant to modern Native Americans and Polynesians.”

That’s because the skull “appears to have strongest morphological affinities with populations in southern Asia, and not with American Indians or Europeans in the reference samples” according to one study.

The interpretations by anthropologists Joseph F. Powell and Jerome C. Rose are based on a scientific technique called craniofacial morphometric analysis. It involves detailed study of the shape of the skull and face, using a sophisticated method called multivariate analysis. In some cases, more than 60 different dimensions of a skull are measured and compared with comparable dimensions considered typical of specific racial groups. [Link]

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Are you a biased voter?

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Last January I posted a link to an online test that you can take, which supposedly reveals if you have even a subconscious racial bias. One of the researchers conducting the study was Harvard’s Mahzarin Banaji. Banaji and her colleagues have just revealed results from their latest set of experiments which, if true, corroborates what many of us have suspected about politics. I love a bit of controversy on a Monday. From the Washington Post:

The field of social psychology has long been focused on how social environments affect the way people behave. But social psychologists are people, too, and as the United States has become increasingly politically polarized, they have grown increasingly interested in examining what drives these sharp divides: red states vs. blue states; pro-Iraq war vs. anti-Iraq war; pro-same-sex marriage vs. anti-same-sex marriage. And they have begun to study political behavior using such specialized tools as sophisticated psychological tests and brain scans…

Emory University psychologist Drew Westen put self-identified Democratic and Republican partisans in brain scanners and asked them to evaluate negative information about various candidates. Both groups were quick to spot inconsistency and hypocrisy — but only in candidates they opposed.

When presented with negative information about the candidates they liked, partisans of all stripes found ways to discount it, Westen said. When the unpalatable information was rejected, furthermore, the brain scans showed that volunteers gave themselves feel-good pats — the scans showed that “reward centers” in volunteers’ brains were activated. The psychologist observed that the way these subjects dealt with unwelcome information had curious parallels with drug addiction as addicts also reward themselves for wrong-headed behavior.

Another study presented at the conference, which was in Palm Springs, Calif., explored relationships between racial bias and political affiliation by analyzing self-reported beliefs, voting patterns and the results of psychological tests that measure implicit attitudes — subtle stereotypes people hold about various groups.

That study found that supporters of President Bush and other conservatives had stronger self-admitted and implicit biases against blacks than liberals did.

Not so fast, say a few expected critics.

Brian Jones, a spokesman for the Republican National Committee, said he disagreed with the study’s conclusions but that it was difficult to offer a detailed critique, as the research had not yet been published and he could not review the methodology. He also questioned whether the researchers themselves had implicit biases — against Republicans — noting that Nosek and Harvard psychologist Mahzarin Banaji had given campaign contributions to Democrats.

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Good Blend of East and West

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Lunar / “Asian” New Years is always an occasion for me to reflect on how different South (brown) Asians are from East and Southeast (yellow) Asians. However, there is an area in which we, apparently, are a mix of both African/European and East Asian genotypes. The area in question is earwax:

Earwax comes in two types, wet and dry. The wet form predominates in Africa and Europe, where 97 percent or more of people have it, and the dry form among East Asians. The populations of South and Central Asia are roughly half and half. [Link]

This is evidence, apparently, of some yellow in the woodpile:

The dry form, the researchers say, presumably arose later in northern Asia, because they detected it almost universally in their tests of northern Han Chinese and Koreans. The dry form becomes less common in southern Asia, probably because the northerners with the dry earwax gene intermarried with southern Asians carrying the default wet earwax gene. [Link]

There must have been a lot of intermarriage if half the populations of South Asia have the East Asian gene. It turns out that the earwax gene is also related to that other, oh so polite topic of conversation, body odor:

Since it seems unlikely that having wet or dry earwax could have made much difference to an individual’s fitness, the earwax gene may have some other, more important function. Dr. Yoshiura and his colleagues suggest that the gene would have been favored because of its role in sweating. They write that earwax type and armpit odor are correlated, since populations with dry earwax, such as those of East Asia, tend to sweat less and have little or no body odor, while the wet earwax populations of Africa and Europe sweat more and so may have more body odor. [Link]

This would imply that half of all South Asians sweat little and have little B.O. Having recently ridden the Delhi metro, my question is … where are they ?

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A theory replaces a hunch

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A new paper published in the Proceedings of the National Academy of Sciences (subscription required) offers a counter theory to the long held Aryan Invasion Theory (thanks for the tip “Gujjubhai” and “Mauritious”). But before I get into that, I want to address a pet peeve of mine. The word “theory” is one of the most mis-used words in the English language. When most people use the word theory, they actually mean to use “hypothesis” or “hunch.” A theory by definition means:

A set of statements or principles devised to explain a group of facts or phenomena, especially one that has been repeatedly tested or is widely accepted and can be used to make predictions about natural phenomena.

By definition a theory has already stood up to repeated challenges, and on the basis of scientific evidence has held true despite many assaults on its validity. Therefore the Theory of Evolution isn’t just some willy-nilly hunch. It has taken on and turned aside all would-be challengers. Everybody “knows” that gravity is real, but did you know that Newton’s gravity is in fact a theory? When dealing with physics that approach the speed of light, the Newtonian Theory of Gravity fails, and Einstein’s Theory of Relativity takes over. Now that we are past that let’s go back to the PNAS paper. First, what is the “Aryan Invasion Theory”:

… a term that refers to the theory developed by 19th Century European linguists to explain the similarity between Sanskrit and European languages, by hypothesising that peoples originating outside India invaded or migrated to India. Another view is that this theory was developed as a means to show the superiority of European Aryan race. Max Muller and other western scholars who studied Sanskrit were very impressed with it and wanted to develop a link of this brilliant language with there own race i.e Europeans. They found some roots common in german and sanskrit and invented AIT. There is no archaeological evidence for the invasion. In ancient times there were abundant contact between civilization in India and Europe and European languages borrowed lot of words/roots from Sanskrit. Interesting fact is that modern non-Indians still cling to this theory even though it has no locus standi or a scientific basis. [Link]

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Long overdue

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A great many tipsters are informing us that People Magazine has included an Indian American as one of its Sexiest Men Alive. Yeah, he’s half Indian and he is “sexy.” So what, I say? That doesn’t really seem that blog-worthy to me. However, what eventually convinced me as to the importance of getting this story out to the people isn’t the fact that he is representing Indian Americans, but rather that he is a proxy for the previously unacknowledged sexiness of all geologists in the Earth and Space Sciences Departments of schools in the University of California system. Meet Michael Manga:

People magazine has featured a geophysicist of Indian origin alongside the likes of U2 frontman Bono in the ‘Smart Guys’ section of its ‘Sexiest Man Alive’ issue.

Michael Manga, a 37-year-old geology professor of UC Berkeley, who won the $500,000 MacArthur ‘genius’ grant earlier in 2005, shares pages with stars like Matthew McConaughey, Matt Damon, Jake Gyllenhaal and Orlando Bloom among others.

“My first inclination, of course, was to say no, because that’s not how I perceive myself,” Manga, father of two boys, said. “But it is a way to let people know about science and that it is OK to be a scientist.” [link]

I think it is a particularly sad commentary on the decadence of our culture that it has taken THIS long to point out that there are in fact “sexy” Indian geologists that deserve to share the same page as Bono.

Manga was one of only two men in academia admitted to the ranks of America’s dreamiest dudes. “That’s why I agreed to do this,” he explains.

“I wanted to get information out to people who wouldn’t normally hear or see anything about science.”

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Not so Intelligent Designing

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I really wanted to write a post about the U.S. Federal Court slapping down “Intelligent Design” in Dover, Pennsylvania today:

A federal judge in Pennsylvania ruled today that it is unconstitutional to compel teachers there to present “intelligent design” as an alternative explanation to evolution because it amounts to establishing religion in public schools.

I couldn’t find a strong Desi-angle beyond what we’ve already blogged about though. So instead, I’ve decided to write a post about “Un-intelligent Design.” Most people know that Hitler’s Third Reich was fascinated by the occult and was always looking for mystical weapons and methods in order to defeat the Allies. Essentially, that is what the plot of Raiders of the Lost Ark is about. He is also thought to have been fascinated by Eastern religions. After reading the following article out today in the Scotsman, I wondered if the brutal dictator Joseph Stalin might have been reading up on his Hindu mythology when he came up with this VERY unintelligent design idea:

The Soviet dictator Josef Stalin ordered the creation of Planet of the Apes-style warriors by crossing humans with apes, according to recently uncovered secret documents.

Moscow archives show that in the mid-1920s Russia’s top animal breeding scientist, Ilya Ivanov, was ordered to turn his skills from horse and animal work to the quest for a super-warrior…

According to Moscow newspapers, Stalin told the scientist: “I want a new invincible human being, insensitive to pain, resistant and indifferent about the quality of food they eat…”

Mr Ivanov’s experiments, unsurprisingly from what we now know, were a total failure. He returned to the Soviet Union, only to see experiments in Georgia to use monkey sperm in human volunteers similarly fail. [Link]

Sick, sick, sick. Nothing is going to convince me that they were really “volunteers.” I wondered if Stalin may have been inspired by Hanuman’s story. He is after all the mightiest of warriors and proved himself during the Ramayana War. He was conceived more naturally…well sort of.

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