Category Archives: Science

Exciting! Safe! Radioactive toys!

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I saw this link on QT3 today. As the original poster says, this is certainly a reminder of a simpler and more innocent era that Fallout 3 captured so well. Imagine Polonium-210, the same substance that Russian assassins likely used to kill Alexander Litvinenko, being sold as part of a science kit for children! I guess the manufacturers were really serious about properly educating young children about the different types of radiation. They even included a form that you could use to order new radiation sources once you’d used yours up. How handy is that? Even better, buy this set and if you find a natural uranium source with it, the U.S. government will pay you a $10,000.00 prize!

Of course, what they didn’t know then was how dangerous radiation really was. Nowadays it seems that not a day goes by without something familiar being classified as a cancer risk. Incidentally, for anyone interested in buying one of these things, it’s worth noting that since Polonium 210 has a half-life of only 130 days and the set was made available only from 1951 to 1952, I can’t imagine there being much of it left even if you could find one of these very rare sets intact.

Recent Interesting Science Articles (February ’09)

I’ve only noted one science article of any interest this month. Perhaps the financial crisis is taking its toll on scientific research as well? This one is from The Economist and covers how social animals make collective decisions. One study by Christian List of the London School of Economics and Larissa Conradt of the University of Sussex examined how bees choose a site to migrate to and start a new nest. As described, scouts are sent out to find suitable locations and when they get back they perform the bees’ infamous waggle dance to tell the rest of the hive what they’ve found out. The longer the dance goes on, the better the site. The entire hive needs to sort out which site is the best one and make a collective decision to move the queen and the worker bees to it.

The scientists found that the hive manages to make extremely reliable decisions even though there are only minor differences in quality between the sites. In order to find out how they did this, they created a computer model to simulate the results from different variables. They found that two aspects of their decision-making process were crucial towards correctly determining the best course of action: one, freely sharing information between the scouts and the rest of the hive and two, the independence of other bees to confirm the scouts’ findings by following their routes, checking out the site for themselves and then confirming the results to the rest of the hive by performing waggle dances of their own.

The implications for human behavior are obvious, though I think that the attempt by The Economist to link this to the theories of the 18th-century philosopher Nicolas de Condorcet, who believed that decisions taken collectively by a large group of people are more likely than those taken by a select few, is a bit of a stretch.

Recent Interesting Science Articles (January ’09)

Again, I’m a little late on this one, so apologies. Three articles for this one, two on different aspects of human nature, and one on cloning. It does seem that I’m focusing a lot on biology these days, but that’s because such articles are more interesting in how they shed light on the human condition and have more potential to fundamentally alter how we view life and the universe than yet another article showcasing some new technological development.

The first article is from The Economist and deals with measuring the difference between the levels of prejudice that people admit to and that they actually seem to have. It summarizes the findings of two different groups of researchers, one at the University of Chicago and the other at York University in Canada, who looked into the matter.

Continue reading Recent Interesting Science Articles (January ’09)

Recent Interesting Science Articles (December ’08)

Three articles for this last installment from 2008, though two are from The Economist, both of which are related to human sexuality in some way. The last one is speculation about a device that could one day be used to let someone see what another person is dreaming about.

The first article from The Economist covers a paper by Rosalind Arden of King’s College, London and her colleagues on correlations between genetic fitness, general intelligence and, of all things, sperm quality, in human males. Researchers have recently discovered that general intelligence is correlated with many aspects of an individual’s health including his or her lifespan. This is unsurprising, because it can be expected that people who are more intelligent might take extra care to live healthier lives, but evolutionary psychologists are also interested in the idea that intelligence is a manifestation of a general, genetically-based healthiness which is attractive to the opposite sex. They believe that humans evolved general intelligence above and beyond its usefulness in everyday life as part of a genetics arms race to attract mates, in the same way that male peacocks have evolved elaborate tails.

Continue reading Recent Interesting Science Articles (December ’08)

Religiosity linked to brain damage (again)

The role of the brain in determining religiosity gets put into the spotlight again by a new study by the University of Missouri. As reported by ScienceDaily, this is one of the first studies that use individuals with traumatic brain injury to investigate the connection between religion and the human brain. The data gathered from this particular study lends support to a neupsychological model that links specific forms of spiritual experiences with decreased activity in the right parietal lobe of the brain.

The type of religious feeling that is relevant here is selflessness and the transcendence of feeling a strong connection with others and the universe. The researchers found that people who had suffered brain damage in that area of the brain reported higher levels of these types of spiritual experiences. The researchers also suggest that it is possible to induce such feelings by reducing activity in that part of the brain through conscious meditation or prayer.

As my post title indicates, however, this is far from the first time that religious inclination has been linked to brain damage. This BBC article from 2003 for example, suggests that people who suffer from temporal lobe epilepsy are prone to suffer from hallucinations that they may interpret as being religious in nature. Even more interestingly, that article references an experiment that involved studying the brain activity of a Buddhist who was meditating and found that the parietal lobes of the brain were almost completely shut down during that time, the same part of the brain that was involved in this new study. According to the BBC article, this area of the brain is responsible for giving us our sense of time and place, which might help explain why shutting it down would make humans feel that they’re not an individual but are instead a part of the wider universe.

I don’t really have the time to examine this in-depth today but this new study does raise an interesting perspective for me personally. In the BBC article, Richard Dawkins, probably the most famous living atheist today, was found to be more or less immune to the effects of a magnetic field directed around the temporal lobes of his brain, while others who had undergone the experience reporting feeling some sort of “presence”. This led the article to suggest that different people may have a variable “talent” for religion. In the same way, would this mean that humans whose parietal brain regions are naturally more active or well developed innately feel more individualistic and self-centered?

Fighting crime one broken window at a time

With crime in the spotlight in Malaysia (again), I thought I should highlight this article from The Economist. It’s about a series of experiments performed by Kees Keizer and his colleagues at the University of Groningen to determine the truth of an old idea: that physical disorder in the environment can lead people to commit crimes more readily. This is the same line of thinking that inspired New York’s efforts to fight more serious crimes by cracking down on minor offenses like graffiti, breaking windows and other forms of vandalism.

One such experiment took place in an alley in which people frequently parked their bicycles. To create a disorderly state, they covered the walls of the alley with graffiti while the walls were freshly painted in the orderly state. Under both conditions, a prominent “No Littering” sign was displayed in the alley. Once bicycles had been parked, the experimenters quickly moved in to put a fake advertisement flyer on the bike in such a way that it would have to be removed in order to ride the bike. When the owners came back, they had to choose either to remove the flyer and keep it on their person somehow, throw it onto the ground, or put it on another bike. The experimenters secretly observed and recorded these reactions and considered putting the flyer on another bike as an act of littering.

The final result was that when the walls were clean, only 33% of bicyclists littered, but if the walls were covered with graffiti, the figure increased to 69%. Other experiments in the same vein showed similar results. If the environment was clean and orderly, people were less likely to commit crimes or break the rules, but in a disorderly environment, people seemed to think that breaking the rules was no big deal.

I point this out because I think that it’s particularly relevant for Malaysia. This is after all the country where putting a prominent “Dilarang Buang Sampah” sign up anywhere guarantees that a pile of rubbish will show up at the spot. One of my pet peeves about Malaysians is that everyone thinks rules and laws are meant to be bent. Just look at the money-lender advertisements everywhere in places where they plainly don’t belong or traffic violations like double-parking. But as these experiments indicate, if you want to live in a safe and orderly environment, you need people to perceive the environment to be safe and orderly, and the only way to achieve that is by cracking down on all crimes, especially the small but highly visible ones, and enforcing the law to its strictest extent.

Recent Interesting Science Articles (November ’08)

Three science articles for this month, one on an exciting new development in the ongoing quest for a real cure for AIDS, one on nuclear energy, and the last one on a theoretical attempt to create a scenario right out of Jurassic Park.

In the AIDS-related news, The Wall Street Journal reports the case of a doctor, Gero Hütter, who managed to functionally cure a patient of the disease at the Charité Medical University in Berlin, Germany despite not being an AIDS specialist. Instead, Dr. Hütter is a hematologist, a specialist in diseases of the blood and bone marrow, and his patient suffered from leukemia as well as AIDS.

Continue reading Recent Interesting Science Articles (November ’08)