Category Archives: Science

Why McDonald’s food rots so slowly

By now, I suspect that almost everyone will have seen the videos of burgers and fries from McDonald’s taking a suspiciously long time to rot. The suggestion is that McDonald’s packs tons of chemicals and artificial preservatives in their products to prolong their shelf life, incidentally also making them very harmful to eat. The Burger Lab, a food blog who was also behind a massive effort to deconstruct the precise composition of McDonald’s fries and make them at home, has punched a hole in this theory.

After an extensive series of tests, he finds that, yes, McDonald’s burgers do indeed take much longer to rot than other burgers, but the reason isn’t due to chemical preservatives. It is primarily due to the large surface area of the burger compared to its volume, causing it lose moisture rapidly. Since the meat is sterile to begin with, this makes it very hard for mold spores in the air to establish a foothold. To further prove his point, he performed another experiment in which the burger was stored in a plastic bag designed to retain moisture, and found that the McDonald’s burger does indeed rot normally in this case. Check out his extensive blog post for more details.

Recent Interesting Science Articles (Oct ’10)

Only a couple of articles this month as I’ve been distracted by other stuff. Both happen to be about biology and more specifically about females. The first one deals with the attraction of the color red. Psychologist Daniela Kayser of the University of Rochester and her team conducted a study in which heterosexual males were separately shown photos of the same moderately attractive woman. Half of the participants were shown a photo in which the model was wearing a red shirt. The other half were shown the same photo, except that this time her shirt was green. The men were then asked to select five questions out of a total of twenty four provided that they were told would be sent to the woman.

The team found that the men who saw the woman in red tended to choose more intimate questions. In a follow up study, another group of men were shown the same photos but this time they were tricked into believing that the woman would be coming into the room with them and they were instructed to arrange the two chairs in the room. The men who were shown the photo of the woman wearing red chose to put their own chair closer to where they thought the woman would be sitting. Apparently, it works for men too as the team has also found that men wearing red were rated by women as being more attractive and of higher status.

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Nobel Prizes 2010

The Nobel Prizes are generally considered to be one of the most prestigious awards in the world but depressingly few people are able to name the winners of the various categories. Compare this to the likelihood of people being able to name past and present Oscar Award winners or how readily sports fans can recite the entire histories of major sporting events. When it comes to the Nobel however, even experienced bloggers who write frequently about economics can get the name of the Nobel laureate in economics wrong, as Steven D. Levitt pointed out recently.

So I thought that listing this year’s winners and summarizing their accomplishments would make for a worthy blog post. We’ll start with the Nobel Peace Prize, which despite being the least objective and most disputed of the different categories, is easily the most well-known among the public. It is also the only one of the prizes to be judged by a Norwegian committee instead of a Swedish institution. Whereas the other Nobel prizes are traditionally awarded only many years after the original breakthrough to ensure that it is real and confers genuine benefits to humanity, the Peace Prize is occasionally awarded only to send a political signal or to encourage someone who is deemed to be on the right path but hasn’t really done much yet, as last year’s award to Barack Obama demonstrated.

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Recent Interesting Science Articles (September ’10)

Three articles this month and all of them have something to do with biology. The first one is about how some chimpanzees in Africa have learned to recognize and disable traps laid by humans. The second is a statistical analysis of divorce rates sorted according to occupation. The last one is less of a formal article and more of a blog post. It’s about the unexpected benefits of being exposed to, well, human semen, of all things.

The chimpanzee article is from the BBC and talks about a groups of chimpanzees in the rainforests of Guinea who appear to have learned how to identify traps laid by human hunters and safely disable them without getting hurt in the process. They appear to be aware of how the different components of a snare trap come together and know which parts are safe to touch and which parts are dangerous. This has explained the observation that chimpanzees in that area rarely get injured by traps.

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Recent Interesting Science Articles (Aug ’10)

This installment will be a little light with just three short articles. One is about how having dogs around seems to improve cooperation between humans, one about using a powerful computer to find every possible solution to the classic Rubik’s Cube puzzle, and the last one looks at how people get trampled to death in large crowds.

Dogs make people more social

The first article is from The Economist and covers research by Christopher Honts and his colleagues at Central Michigan University who wondered if having dogs around in the workplace improved collaboration among people. This was because previous research has indicated that dogs help their owners forge intimate relationships with other people.

Continue reading Recent Interesting Science Articles (Aug ’10)

The ancient Greeks were just as kitschy as we are

Today,  when we think of classical art, few things are as dignified and tasteful as the crumbling statues of ancient Greece. There’s something about the bare, weathered stone pieces, so full of history, that elevates them above mere decoration. In fact, we’re so used to the way they look now that it’s hard to imagine what they might have been like when the pieces were first made.

The article however shows how ultraviolet light can be used to reveal what they were like, or more importantly, what the artists of the time intended them to look like. All of a sudden, the statues seem a lot less dignified and very much like something we might find in a modern amusement park. Take this for example:

The ultraviolet light works by causing the organic compounds used in the original paint to fluoresce. Even in cases where it is difficult to figure out what the original hues were, researchers can also use infrared and x-ray spectroscopy to discover what materials were used to make the paints and derive what the colors must have been from there. It turns out that the Greek artists tended to use very tacky and loud colors which we wouldn’t find tasteful at all.

As one commenter on the article notes, it makes us wonder if someday far in the future, archaeologists might unearth the remains of Disneyland and think that all those figures and decorations represented the pinnacle of our art and were objects of great veneration.

Recent Interesting Science Articles (Jul ’10)

Four articles this month and it’s a pretty mixed bag. The most controversial article of the bunch is one that links autism with wealth, but the one drawing a link between human intelligence and disease rates in different countries comes a close second. Then, there’s the highly speculative paper that offers a new model of the universe that abandons the familiar Big Bang. Finally, just for fun, there’s one article talking about a cheap and effective way of deterring thieves from stealing your car.

Autism, disease of the rich?

The precise causes of autism is as yet unclear and it doesn’t help matters that there’s a major anti-intellectual movement that attempts to link the disease to vaccination. This post on Neuroskeptic points out that autism appears to be more common in rich countries than poor ones, which is odd, but might be explained by the fact that many cases of autism in poor countries might simply be undiagnosed. A new paper however attempts to correct for this ascertainment bias and it discovered that not only were incidences of autism more common in richer countries, they were also more common among richer people in rich countries, independent of ethnicity.

Continue reading Recent Interesting Science Articles (Jul ’10)