Tag: encyclopaedia

Posted in Philosophy

Ship Of Theseus

Posted on by Jinavie

An ancient Greek philosopher named Plutarch pondered this scenario. Imagine that the Greek hero Theseus was to repair his ship after a long journey by replacing broken parts with new timber. If he was to embark on so many journeys and repair his ship so much that all of the original material that made the ship were replaced, is that ship still the same ship of Theseus?

This is an interesting philosophical question where some may argue that the ship is still, by definition, the “ship of Theseus” while some may argue that it is no longer the same ship Theseus once owned, but merely a replacement.

Although it is hard to grasp the significance of this question when using an analogy of ancient Greek heroes and ships, it comes closer to home in the field of biology. It is a known fact that the human body is under constant change; cells divide to produce a new lineage of fresh cells while shedding away old, dead cells. Different cells turnover at different rates; skin is almost completely replaced every 4~6 weeks, the lining of the gut is turned over every 4~6 days, while brain cells are almost never replaced (but contrary to popular belief, they can regenerate). If this is the case, are you the same “you” as you were a year ago when the majority of your skin and gut cells were technically “different” (but genetically identical) cells to what they are now? Or are you simply a replacement shell for your brain?

A simpler way of thinking about this would be to consider the case of clones: are clones the “same” as their originals?

The paradox of the ship of Theseus can be extended into a larger scale. Consider a large city like New York. If we were to assume that all of the inhabitants of a city are replaced over a hundred years, then is that city still “New York”? Not only would it looks different because of its new buildings and whatnot, but the people that make up the culture and substance of the city would be completely changed. However, New York is still called “New York” just as it was in the early 1900’s. So is the modern day New York still New York or New New York?

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Posted in Science & Nature

Blue

Posted on by Jinavie

Why is the sky blue? This is because of a phenomenon called Rayleigh scattering where molecules and tiny particles in the atmosphere scatter direct sunlight. Light scatters at different amounts depending on its frequency. Because of this, blue and violet light (short-wavelength light) scatters more than the other colours, causing the sky to be blue. But during sunrise and sunset, the light enters the atmosphere from an angle, causing blue and green light to be so scattered that you cannot see it. This produces a red or orange colour.

The deep ocean is blue for a similar reason; red and yellow light is absorbed while blue becomes scattered by the water. However, the colour of the sea is also largely dependent on the colour of the sky at the time, as it reflects the sky. The colour of the sea may change due to algae in the water, which can make it green, brown or even red.

A similar form of light scattering called the Tyndall effect is responsible for blue eyes, caused by a turbid layer in the iris. The Tyndall effect can also be seen in a glass of water mixed with milk, or flour suspended in water.

Blue has one of the most interesting histories compared out of all the colours. In the ancient world, blue was considered a lowly colour, with some cultures such as the ancient Greeks not even considering it a “real colour” such as red, black, white and yellow. In fact, the Greeks did not have a word for the colour blue; it was merely called bronze colour. The ancient Romans considered blue the colour of barbarians. The Romans stereotyped blue-eyed women as promiscuous and blue-eyed men as aggressive and foolish. Only the ancient Egyptians liked the colour blue, as they considered it a colour of divinity. They made blue dye from copper.

Perhaps the hatred for the colour blue was due to the difficulty of making blue dyes. This all changed nearer to medieval times as artists and dyers successfully created blue dyes from minerals such as lapis lazuli, azurite and cobalt. Blue became the colour of the Virgin Mary. Artists began painting the sky and the sea as blue, which were previously depicted using black, white and green. Nobles began wearing blue instead of the traditional red and purple, and dyers followed this trend by devising better blue dyes with a variety of shades.

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This led to the thriving of blue dye industries in European cities such as Amiens, Toulouse and Erfurt, where blue dye was made from a plant called woad. Although this was a very lucrative business, blue was still a very expensive and difficult colour to use, with the dying process involving soaking the woad in human urine (which contains ammonia) to extract the colour.

Blue became a much more accessible colour in the 18th century when flourishing trade brought indigo from the Americas. Indigo was much easier to use, more concentrated and produced a richer, more stable blue than woad. As blue became more and more popular, synthetic blue dyes were discovered – one of the most famous being Prussian blue which was discovered in Berlin in 1709.

Throughout its history, perhaps the product that best promoted the status of blue as a colour is the denim jean (dyed with indigo blue), invented by Levi Strauss in 1873. 

In modern times, blue is an extremely popular colour that is widely used in art, fashion, architecture etcetera. However, the one field that blue has not yet been able to set foot in is food. Researches show that the colour blue drastically decreases a person’s appetite as it is associated with poison in the natural world.

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Posted in Science & Nature

Wine Aging

Posted on by Jinavie

One of the (many) defining features of a “great wine” is the aging of the wine. The complex chemical reactions between the wine’s sugars, acids and tannins can produce a much deeper, sophisticated aroma and taste that stays in the mouth for longer. For example, the tannins break down to give a softer mouthfeel. Acids and alcohols combine in the wine to form esters – chemical compounds that produce very unique smells. This also reduces the perceived acidic taste of the wine, making it less sour. The longer the wine has aged, the more of these chemical reactions occurs and the wine typically improves in quality.

Of course, the problem with wine of excellent quality is the price and the time required to age the wine. Is there any way to artificially “age” wine? The solution lies in something that sounds like science fiction: irradiating the wine.

If you expose a bottle of wine to radiation (about 500 rads) for an hour, it can greatly improve its maturity. In a simple experiment, blind-tasted sommeliers could not believe that the two glasses of wine – one before irradiation and one after – were exactly the same. In fact, they valued the irradiated wine at almost five times the market price of the original bottle. The reason for this is that radiation accelerates the esterification process of the acids in the wine, producing a much deeper and smoother taste.
There are also other experiments that have shown that magnetism, ultra-sonic waves and high-voltage electricity can all be used to artificially age wine.

Although radiation does not turn people into superheroes, it turns out it can for wine.

Posted in History & Literature

Destroyer Of The Environment

Posted on by Jinavie

In the history of mankind, who could be considered to have done the most damage to the environment? Although many names may pop up, no one comes close to the destruction that resulted from one man: Thomas Midgley Jr. While working for General Motors in 1916 as a chemist, Midgley discovered that adding iodine to kerosene reduced “knocking” in engines – where pockets of air/fuel mixture explode in the engine. The effects of knocking on engines range from negligible to destructive. However, he found that the iodine only reduced knocking slightly. To improve on this, he tried adding different elements to fuel until he found the magic solution – lead. And so, the leaded petroleum was born.

Leaded petrol was an instant commercial success and it became the most popular choice of fuel. This resulted in cars, buses, planes and almost all motor vehicles pumping out billions of tons of lead into the atmosphere for over seventy years. Unfortunately, lead is a highly toxic metal that causes symptoms such as muscular weakness, pain, nausea, vomiting, fatigue and madness. Lead poisoning is particularly dangerous to children as it can cause irreversible retardation of physical and mental development. Even though the effects of lead poisoning were recognised since the late 19th century (with many workers and even Midgley himself suffering from it), it was only after the 1970s when fuel companies stopped adding lead to their fuel. Thanks to Midgley’s idea of adding lead to petrol, who knows how many children would have suffered a crippling illness due to lead poisoning.

But Midgley’s “accomplishments” did not stop there. In the late 1920s, Midgley decided to tackle the problem of using sulfur dioxide, propane and ammonia as refrigerants (possibly out of guilt over the whole lead fiasco), which were effective but prone to combusting or exploding. Within three days, he developed an alternative – dichlorofluromethane. This amazing gas was inert, non-toxic and did not have the risk of exploding. It was the first of the chlorofluorocarbons (CFC), which was named “freons”. We now know that freons are responsible for destroying the ozone layer.

In 1940, Midgley contracted polio, causing him to be disabled. Poliomyelitis causes paralysis due to the destruction of motor neurons. Being an inventor, Midgley devised a clever device that would help him off the bed using pulleys and strings. Unfortunately, one day the invention twisted in a certain way, leading him to become entangled in the ropes and being killed of strangulation.

Such was the sad life of Thomas Midgley Jr, who environmental historian J. R. McNeill dubbed “[someone who] had more impact on the atmosphere than any other single organism in Earth’s history”.

Posted in Philosophy

Truth And Lies

Posted on by Jinavie

You are walking along the road when you reach a fork, where you see two guards chatting with each other. You approach them to ask which way you should go, but you notice a peculiar sign that says: “One of us always tells the truth, one of us always lies”. There is no way for you to know who tells the truth and who tells lies. If you could only ask one question to help you walk down the right path, what would you ask the guards?

The solution is simple: all you have to do is ask “If I asked the other guard which road is the right one, which road would he tell me to take?” then go to the opposite road. The reason being, no matter who you ask – truth-teller or liar – they will tell you the wrong answer. If you asked the truth-teller, he would honestly reply with what the liar would say, which is the wrong answer. If you asked the liar, he would tell you the opposite of what the truth-teller would say, which would ultimately be the wrong answer.

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Posted in Science & Nature

Rain

Posted on by Jinavie

Let’s imagine that you are walking outside, when rain clouds catch you by surprise and suddenly pour down on you. Assuming that you have no umbrella or anything to cover yourself with, is it best to run back home or walk back? Or to elaborate, should you walk and spend more time in the rain, or should you run, which means you will run into rain sideways?

There are two ways you can get wet in the rain: it will either fall on top of your head, or you will run into it from the side. The amount of rain that falls on your head is constant whether you are walking or raining, as the entire field you are travelling through is full of raindrops. Therefore, one would naturally think that running would not add much benefit as you run into more rain by moving faster, as you essentially hit a wall of raindrops.

But this is not true. No matter how fast you travel, the amount of rain you hit sideways is constant. The only variable that affects the amount of rain you hit sideways is the distance you travel. This is because the amount of raindrops in the space between you and your destination is constant.

Summarising this, the wetness from rain you receive is:

(wetness falling on your head per second x time spent in rain) + (wetness you run into per meter x distance travelled).

Since you cannot really change how far you are from your destination, the best way to minimise getting wet is to run as fast as you can to minimise the time you spend in the rain.

Then again, this is only the most practical option to keep you dry. If you are feeling particularly romantic or blue, then feel free to stroll through the rain, savouring the cold drops on your face (or wallow in the sadness that is your life).

(Here’s a very good video explaining the maths/science of it all: http://www.youtube.com/watch?v=3MqYE2UuN24)

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Posted in History & Literature

2012

Posted on by Jinavie

One of the things that mankind has been fascinated with throughout history is the concept of an apocalypse or doomsday. Just in the last decade, there have been no less than fifty claims that the world would end on a certain day. The most famous of these include Nostradamus’ prediction that the world would end on July 1999, the Y2K problem that suggested that the year 2000 would cause all computers to malfunction, and many claims that a certain date would be the Rapture – the second coming of Christ and the end of the world. The latest of these doomsday predictions is the one regarding the Mayan calendar. There are claims that on the 21st of December, 2012, the Mayan calendar finishes its 5125-year cycle, leading to a cataclysmic event that will destroy the universe. But of course as usual, this theory is complete and utter nonsense.

Firstly, there are no records that the Mayans predicted that the world would be doomed when the cycle would finish. It is true that December 2012 marks the end of a b’ak’tun – a time period in the Mesoamerican Long Count calendar equating to about 394 years, much like how we measure 1000 years by 1 millennium. Essentially, it is like a “turn of the century” for the Mayans. Pretty much the entire concept of the Mayan calendar ending bringing doom to us all was fabricated by some shoddy academics and New Age believers.

Secondly, every theory about how the world might end in such a scenario has been disproven. Some of the most popular “theories” were: the collision of a Planet X or “Nibiru” with Earth, geomagnetic reversal and galactic alignments. However, to this date (20th December, 2012), there are no large rocks or planets hurtling directly towards Earth (would have been noticed by thousands of astronomers worldwide months prior), the magnetic poles are stable (even if they switched it would not cause much harm) and there are no alignments between planets, moons or stars scheduled at the time.

No matter how crazy the theories and predictions are, there will always be people claiming that the world will end soon, and that we should repent our sins or something like that. Even better, there will be a significant amount of people who believe it or at least worry enough about it to affect their lives somehow.

Perhaps the most fitting quote for this phenomenon is something that Martin Luther wrote in his diary at a young age: “Even if I knew that tomorrow the world would go to pieces, I would still plant my apple tree”. Whether the world is ending or not, live your life to the fullest, seizing every day and making the most of your chances.

Posted in Science & Nature

Chicken Or The Egg

Posted on by Jinavie

One of the most well-known philosophical questions is what came first: the chicken or the egg? A chicken is born from an egg, and an egg is birthed by a chicken. This means that the cause and effect are intertwined in a never-ending cycle. This kind of problem is known as circular cause and consequence or circular reference.

In some ways, this question is extremely easy to answer. In biology, many different creatures lay eggs to give birth to their young, but there are no examples of a chicken being born without an egg being involved. The chicken is most likely a product of a lineage of evolving species that ultimately resulted in the genetic makeup of a chicken. That “proto-chicken” would have laid an egg, which had enough mutations in its genome to be sufficiently different from the proto-chicken to be called a “chicken”. Therefore, the egg must have come before the chicken. Even if we use the strict rule of defining “egg” by as a “chicken egg”, the egg that birthed the first chicken contained the original genetic makeup for chickens; ergo the chicken egg came before the chicken.

Science and philosophy aside, a completely unrelated point about chickens and eggs is that there is a Japanese dish called oyakodon, which is made with chicken and egg over a bowl of rice and vegetables. The name comes from the Japanese for parent (“oya”, 親) and child (“ko”, 子), giving away the cruel nature of the relationship between the main ingredients in the dish.

Posted in History & Literature

Judgement of Solomon

Posted on by Jinavie

The Bible tells many stories of a King Solomon, son of David. King Solomon is most famous for his wisdom, of which there are many accounts of in the Bible. The following is an example of the wisdom of Solomon.

There once lived two women living under the same roof who both gave birth to a son at similar times. One of the mothers accidentally smothered her own son while sleeping, and decided to switch the two infants, claiming the living one to be her own. The other woman instantly noticed that the dead baby was not hers and confronted the culprit, asking for her baby back. She refused, leading to a very heated argument that ultimately ended up in the court of King Solomon. The two women pleaded him to make the decision of who the real mother was. After much deliberation, King Solomon called for a sword to be brought before him. He stated that since both women were claiming the boy to be their own, there was only one solution: to split the baby in two and give each person a half of the baby. The lying woman, in bitter jealousy, urged King Solomon to cut the baby. She thought that if she could not have the baby, then no one shall. The true mother, mortified by what King Solomon planned on doing, pleaded him to just give the baby to the other women and not to kill the baby. The king then judged that she must be the true mother and gave the baby back to her, while punishing the other for her sins.

The story shows how the wisdom of King Solomon led to justice and reuniting the mother and baby by method of creating a fake situation that would instantly distinguish the actual mother from the liar. The expression “splitting the baby” is still used in legal professions to describe the act of coming to a simple compromise between two parties.

The intended moral of the story is probably to teach people that wisdom can defeat even the greatest of challenges. But perhaps the real moral of the story is: if you are insane enough to steal a baby, at least have enough acting skills to follow through with it instead of telling someone to kill the baby.