Posted in Psychology & Medicine

Silphium

Although sex was devised by Mother Nature to promote procreation, humans have been trying to separate the baby-making aspect of sex from the pure carnal pleasure it gives for a very long time. The Romans are known to have used a fennel-like herb called the silphium as a form of birth control. They discovered that the leaves of this plant could be ground up and made into a resin pill, which seemed to reduce the likelihood of women becoming pregnant. The Roman scholar Pliny the Elder recorded that one could use the resin as a pill or pessary to promote menstrual discharge, suggesting pregnancy has not occurred.

News of this medicine spread throughout the empire and there was massive demand for it. The plant grew exclusively on a narrow coastal area in present-day Libya and was impossible to cultivate. This meant settlements in this area could trade the plant at a very high price. It is said silphium was “worth its weight in denarii (silver coins)”. Its economic importance is signified in coins from Cyrene (an ancient North African city where silphium was produced) depict the silphium plant or seed. In fact, one theory of the origin of the heart symbol is the shape of the silphium seed pod. Overharvesting of the plant, the fact that it could not be cultivated and other factors such as changing environments and overgrazing ultimately led to the extinction of this plant and scholars still debate the exact identity of the plant.

Although there are records that indicate silphium was used as a contraceptive and abortifacent (substance that induces abortion), it is unclear as to how effective it was. Related plants such as wild carrots have shown to have abortifacent properties in some studies and there certainly are a vast list of plants that could potentially harm or terminate a pregnancy. Regardless of the potency, the heavy trade of the plant and its intended use points towards the fact that the concept of contraception is not new to human civilisations. It is interesting to think that we are the only species to actively want to reduce the risk of making a baby during sex, which is the original purpose of sex.

Posted in Philosophy

Ouroboros

The Ouroboros is a symbol that depicts a serpent or a dragon biting its own tail, forming a ring. It is the symbol of cyclicality – something that is in a constant cycle of rebirth through the three steps of creation, maintenance and destruction.

The concept of a serpent devouring itself likely stems from the ancient belief that a snake shedding its skin is the act of leaving an old, inferior body to be reborn into a better, new body. The ancient Greeks explained that the Ouroboros connects its beginning (mouth) and end (tail) to form a metaphor for the link between life and death. By forming a circle, the Ouroboros has no beginning and no end; it is an infinite, linear path that cycles endlessly. Because of this, the Ouroboros is also the symbol of infinity, immortality and the cycle of time. An alternate ancient explanation for the Ouroboros is that because it eats itself, it will ultimately end up as nothing.

The Ouroboros was an important symbol in medieval alchemy. Alchemists used the symbol “O” to represent the Ouroboros. To the alchemists, the Ouroboros was an entity that did not place importance in the two natural processes of creation and destruction, but the often-neglected third force – maintenance. This neutral process is the connection between the start and end of anything. Alchemists knew that in any chemical reaction, the process is just as important as the starting ingredients and the final product. The Ouroboros also represented “everything” and “perfection” to alchemists as it connected its own beginning and end. Because of this, the Ouroboros came to represent the Philosopher’s stone.

Perhaps the most relevant application of the Ouroboros to us is the concept of rebirth and cycling. Nothing in nature is permanent. Matter changes states, chemicals react and species evolve. We too are never permanent. There is always room for change – to destroy what you do not like about yourself, create something better and then maintain that state until the next cycle comes. As much as it is important to know to love who you are, it is vital that you continuously recycle, refine and develop yourself to become the person that you are truly happy to call “me”.

Posted in History & Literature

The Oldest Trick

Magic has been a great source of entertainment for the masses for thousands of years. Across the globe, under many guises, magicians have amazed audiences with seemingly impossible “miracles” using misdirection and clever trickery. The oldest recorded trick – that is to say one performed purely for entertainment and not under the guise of religion or supernatural power – dates back to ancient Egypt.

According to the Westcar Papyrus, a magician by the name of Dedi was famous for his miraculous feats. The Papyrus tells the story of how Dedi was called to put a show on for King Khufu. He proceeded to decapitate a goose, then reattach the head, bringing the bird back to life. He repeats the magic with a duck, then with a bull, wrenching its head off then bringing it back to life by reattaching the head. For his amazing performance, he is rewarded by being allowed to live in the palace. This trick is still practised by magicians to this day, thus making it the longest performed trick in history.

Posted in History & Literature

Prostitution

They say that prostitution is the world’s oldest profession. The job sure lives up to its reputation – the first recorded incidence of paying money for sex is in 2400BC, where prostitution is recorded among a list of professions in ancient Sumer. Of course, there is no proof of it being literally the “oldest” profession, because the money (or any currency) to pay for sex must have come from somewhere else. Evidence of prostitution can be found in almost every other ancient civilisations, including the ancient Babylonians, Greeks, Romans, Egyptians, Jews, Aztecs, Korean, Chinese and Japanese. It is also heavily referenced in the Bible, suggesting that it was a widely spread profession.

As unnatural as the act of paying for sex may seem, prostitution has been recorded in animals as well. In 1998, a marine biologist named Fiona Hunter was studying the mating behaviour of Adélie penguins. She observed that the penguins would couple up and begin building a nest for their future offspring. The females would go out alone to look for pebbles at the beach. But then, she noticed that some female penguins would not head to the beach to collect the pebbles. Instead, they approached another male penguin (usually one that was single) and engage in courtship rituals to lure them into having sex. The female would then grab some pebbles and run off, while the male just let her go. Hunter concluded that this behaviour was indeed a material exchange for sexual pleasures.

Similar behaviour of offering food or grooming for sex has been observed in different primate species such as chimpanzees and crab-eating macaques. The most interesting study on this topic was that of training capuchin monkeys to use a currency. As soon as they learned that the silver discs could be used to purchase food, monkeys were seen “gifting” these silver discs to each other in exchange for sex. This kind of behaviour does not seem too unnatural if you consider that sex is a biological need (or at least a strong want), and sexual pleasure is, psychologically speaking, one of the strongest rewards.

Prostitution is generally deemed immoral and looked down upon, especially given the exploitation of women for their bodies and cheapening the act of making love. However, it should also be noted that throughout history, there are several cases of women using it as an opportunity to achieve something great. For example, Rahab was a harlot from Jericho in 1400BC. Back then, intelligent, independent women could not have much freedom as a married woman was treated as a slave to her husband. As a harlot, Rahab could live her own life and make her own decisions. When the city of Jericho was laid under siege by King Joshua, he sent in two spies to scout the area. Rahab hid these two men from the guards of the king of Jericho and showed them the secret passages of the city, ultimately allowing for Joshua to conquer the city with easy.

There is also the case of Theodora of Constantinople, who rose from being a harlot to an empress by seducing the Emperor Justinian, who made her a valued co-ruler of the empire. She then proceeded to use her power to crack down on the exploitation of women and protecting women’s rights.

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Posted in Psychology & Medicine

Viscera: Spleen

(Learn more about the organs of the human bodies in other posts in the Viscera series here: https://jineralknowledge.com/tag/viscera/?order=asc)

The spleen is one of the lesser known organs of the human body. If you asked the lay person, they would not know what the spleen does, let alone where it is. The spleen is a solid organ that lies in the left upper corner of the abdomen, tucked under the left diaphragm (opposite to the liver which lies under the right diaphragm). Its functions are mainly related to blood, such as removing old red blood cells (sequestration), storing platelets in case there is an emergency bleeding, making antibodies and releasing lymphocytes (type of white blood cell) to help fight infection and in times of need, creating red blood cells. Red blood cells are usually made in bone marrow in adults, but if the bone marrow fails (e.g. leukaemia), the spleen and liver can step in to create vital blood components (extramedullary haematopoiesis).

As most of the functions of the spleen are not technically necessary to sustain life, it can be removed without significant consequences. The spleen is sometimes removed when a patient has severe thrombocytopaenia (lack of platelets) or when the spleen is damaged by trauma. Because it is a solid organ, trauma to it such as a kick to the stomach can cause it to rupture (i.e. break in to pieces). Splenic rupture can cause life-threatening haemorrhage (bleeding) and may not be evident in trauma cases. A person without a spleen needs regular check-ups and immunisations to help fight infections as they have a weakened immune system.

The role of the spleen was a mystery for thousands of years and thus various cultures tried to explain various medical phenomena using the spleen. The ancient Greeks thought the spleen produced black bile, which was associated with melancholy. The spleen was also associated to anger by the English and laughter by the Talmud.

Posted in Philosophy

Ship Of Theseus

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

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 History & Literature

Rod Of Asclepius

There are many symbols that represent the field of medicine such as a red cross or a stethoscope. However, one of the most famous symbols representing medicine and healthcare is the rod of Asclepius. This symbol is used in the logos of numerous medical associations and army medical corps. Those who do know of the rod may describe it as a staff with two wings and two snakes intertwining on it, but this is a common misconception. That symbol is called the caduceus and is actually the symbol of Hermes – the Greek god of messengers, merchants, markets, the high roads, gamblers and thieves. The misconception is very common and many medical associations use the caduceus as their symbol instead of the correct Rod of Asclepius.

The Caduceus

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The actual rod of Asclepius is much simpler looking, as it is simply a stick with one serpent intertwining it. The reason that it is associated with medicine and healthcare is that it was wielded by the Greek god Asclepius – the god of medicine and healing. Asclepius was the son of Apollo and had a particular interest in the human body and the healing of ailments. The ancient Greeks often referred to Asclepius in the field of medicine. In fact, the famous Hippocratic Oath originally began with the line “I swear by Apollo the Physician and by Asclepius and by Hygieia and Panacea and by all the gods…” (Apollo was the god of many things and medicine was one of his minor domains).

The rod of Asclepius

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So why does the rod of Asclepius have a serpent wrapped around it? In Greek mythology, it is said that Asclepius commanded many non-venomous snakes which he used in healing rituals. The snakes would crawl around the temple, living freely among the physicians and patients. A certain species of snake called the Aesculapian snake is considered to be the model for this story. The reason why the Greeks chose the snake as the animal of healing may be because snakes shed their skin periodically – symbolising rebirth and fertility. 

Another possible root of the symbol may be the traditional treatment for a certain parasitic infection. The Guinea worm (Dracunculus medinensis) is a parasite that lives under the skin, digging itself out through a painful blister when mature. As the blisters burn, the patient immerses the area in cold water to soothe it. The worm detects the change in temperature and releases its larva, completing its life cycle. The traditional treatment was to slowly pull the worm out of the skin, entwine it around a stick and leave it for a period of hours to weeks until it would be completely removed. The Greeks may have taken this image (of the worm wrapped around a stick) and applied it to the rod of Asclepius.

Posted in History & Literature

Nude

The concept of the female body being the ideal subject for nude art only became popular around the 16th century when the Renaissance was in full bloom. Art before this time mainly focussed on the male figure that could portray the perfection of gods, such as the young and beautiful Apollo or Jesus Christ on the cross. In ancient Greece, the naked male figure was associated with triumph and victory (possibly related to the Olympic games being played in nude). Thus, statues focussed on nude male figures, with female figures tending to be clothed.

The point in history when this perception of nudity changed was when an Italian artist called Giorgione painted the Sleeping Venus in 1510. This painting portrays a nude Venus (or Aphrodite) lying peacefully on white and red cloths upon the backdrop of Venetia. This new type of nude art where the naked female form was displayed – with the figure posed with grace and shyness – sparked a revolution, changing the concept that the female body evoked an “uncomfortable feeling” in the audience. Many art historians consider this painting one of the starting points of modern art.

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Posted in History & Literature

Surgeon

In many cultures (especially in Asian countries), the public conception of doctors has changed where surgeons are considered the “real doctors”. This is particularly evident in Asian dramas where main characters tend to be surgeons, saving the patient’s life with dramatic operations and charisma. The idea that surgeons are superior to physicians may go as far as some adults advising medical students to become surgeons for a higher status (again, more evident in Asia). However, as the root of surgery is completely different from that of medicine, technically it is a misnomer to call a surgeon a “doctor”.

This is reflected in the relatively unknown fact that a fully-trained surgeon is referred to as “mister”, not “doctor”. To understand why surgeons call themselves Mr., we must look into the origin of the surgical discipline.

In ancient times, surgery was limited to treating flesh wounds and setting bones (with some exceptions such as trepanation), such as those sustained during battles. Other than the odd few cases of specialised surgeons such as Galen of ancient Greece and Hua Tuo of ancient China, it is hard to find records of doctors employing surgery as a form of treatment. This was mainly due to two reasons: that surgery was considered a “dirty, unrefined” form of treatment, and that surgery was too risky.

For a long time, especially in the Western world, surgery was considered to be of a lower status compared to medicine. It was considered more of a craft tradition – something which physicians believed was beneath them. Because of this, surgeries were mainly performed by barbers in medieval Europe. One can still find evidence of a barber’s alternative historical role on the barber’s pole, which has white, red and blue stripes. The white stripe symbolises bandages, the red symbolises arterial blood and the blue symbolises venous blood. This originates from the practice of bloodletting, where white bandages wrapped around a pole would get dyed red from the blood, giving the appearance of the barber’s pole. The profession of “surgeon” did not formally appear until around the 18th century when a Guild of Surgeons was formed in England. However, physicians refused to accept surgeons as equals for a further century. When they did come to accept that surgery was a legitimate form of medical treatment, the surgeons decided that they did not want to be assimilated as doctors, so they chose to keep their title of “mister” to distinguish themselves from physicians.

The reason why surgery was considered an unrefined art in the past mainly focuses on three issues: bleeding, pain and infections. Before modern surgical developments, uncontrolled bleeding was a real issue in surgery. This not only made surgeries extremely messy, but it was also dangerous for the patient as patients would often die from shock (dangerously low blood pressure). On top of this, anaesthetics was only introduced in the late 19th century, meaning before that, patients had to suffer the pain of their flesh being cut and stitched with no relief. Of course, this meant that surgeries were almost always a brutal scene, with the agonising screams of the patients filling the room, while they sprayed blood everywhere. Lastly, even if the patient somehow survived the surgery without bleeding out or dying from the stress and pain, there still remained a high risk of post-operative infection. Thus, surgeries were most often unsuccessful and were considered a barbaric form of treatment with no promise.

Thanks to medical advancements, surgery has become an important aspect of medicine, where one cannot live without the other. However, the tension still remains between physicians and surgeons, with each profession jokingly mocking the other whenever a chance arises.