survival – Page 2 – Jineral Knowledge

Cuteness

Posted on 26/08/201114/02/2019 by Jinavie

The word cute is used in many different contexts: a girl saying a guy is “cute” could mean that she finds him attractive, while a guy saying a girl is “cute” may imply that they find them lovable but not in an attractive way. But essentially, cuteness can be described using the concept of neoteny.

What is neoteny? This is a concept in evolution where adults of a species preserve traits of youth. The end result is a mature organism that appears to be immature. A good example of this is the axolotl, which preserves its juvenile aquatic form (e.g. gills and overall look) in adulthood, even when they are living amphibiously.
It has been hypothesised that human beings originate from neotenised chimpanzees, as a baby chimp has striking resemblance to a human.

Cuteness and neoteny have an extremely intricate relationship. It is common knowledge that the most powerful attractors of care from an adult is cuteness. Almost every infant organisms have “cute” appearances that make people instantly feel warm and fuzzy. Ergo, being cute (i.e. neoteny) is a survival advantage as the young are cared for more until they are mature. This simple concept has led to the lengthening of childhood in humans, as children require a long time under the care of adults while they absorb knowledge and learn how to function in society. This also solved the problem of babies being born with immature brains (as the head is already too large to fit through the birth canal) and still having a chance at survival.

It has been scientifically proven that people with cuter faces are seen in a more positive light, more likely to be hired and less likely to provoke aggression in violent people (the human brain is wired to inhibit aggressiveness when faced with cuteness, presumably an effort to reduce child abuse and improve survival). In short, cuteness invokes maternal or paternal love and causes a sudden want to protect the cute thing.

This leads to another advantage of cuteness: attractiveness. Although beauty and cuteness are almost diametrically opposed, many men (and women) find “cuteness” to be appealing in the opposite sex. This is likely related to the brain confusing parental love with romantic love. A youthful look is also associated with fertility, which greatly influences a man’s subconscious choice of a partner. However, it is also true that because of this effect a man may see a cute girl only as a “little sister” figure they need to protect, rather than a potential love interest.

So what makes for a cute person? As stated above, these are traits of neoteny, or in other words:

large eyes
small nose
small jaw and teeth
flattened and rounded face
large brain/forehead (causing the eyes/nose/mouth to be lower on the face)
hairless face and body
limbs shorter than torso length
legs longer than arms
upright posture

These characteristics are commonly used in animations and cartoons to boost the audience’s affection towards the character. This is especially the case in Japan where the a cultural obsession with cuteness is clearly evident.

Science & Nature

Water Bear

Posted on 18/06/201112/02/2019 by Jinavie

A water bear, also called a tardigrade, is actually an insect and not a bear. The nickname is due to its slow, bear-like gait. It ranges in size from 0.1 to 1.5mm and resembles a short caterpillar with eight legs.
The reason for the water bear’s fame is its amazing survivability. In short, a water bear can live anywhere.

Water bears are capable of cryptobiosis. This can be seen as an extension of hibernation and it is an organism’s ability to lower its metabolism to near-death rates in order to survive a harsh environment. In this state, a water bear can survive for indefinite amounts of time.

Why is cryptobiosis useful? The answer can be found from the water bear’s natural habitats. The water bear is found on the highest point of the Himalayas, the deepest oceans, hot springs and virtually any location from the North Pole to the South Pole. It can survive temperatures from 151°C to minus 273°C, the intense pressures in deep seas and even vacuum states.
Furthermore, water bears can survive in space. A recent experiment by NASA on the International Space Station found that not only can they live in space, but they also mated and laid eggs that later hatched. They can even survive heavy doses of radiation and toxic chemicals.

Ergo, if a cockroach can survive a nuclear war, water bears can survive even if the Earth was split in two. If we took a leaf out of the water bear’s book and lead a slower life, could we live a longer and happier life?

Science & Nature

Forecast

Posted on 02/06/201129/07/2024 by Jinavie

When the weather forecast says today will be sunny, it always seems to rain (and vice versa). In fact, according to a US study, forecasts are sometimes less accurate than flipping a coin. If not even professionals can accurately predict the weather, can ordinary people like you and I do it?
The key to this is observation. By carefully studying your surroundings, you can look in to the future.

There are many signs before rain comes. For example, if the sunset is unusually clear or if a mountain far away looks smaller or hazy then it is very likely that it will rain the next day. If you see a rainbow in the morning it suggests rain is coming from the west. On hot days without any wind, it is likely there will be a heavy shower.
Animals are also adept at telling the weather. Frogs crying, worms coming out and swallows flying low are all signs that the air is humid and rain is coming. Swallows are especially accurate, as they fly low to catch insects that cannot fly high due to the humidity weighing them down.
If you are at the beach and there is a swarm of jellyfish, avoid going out to sea. Jellyfish near the coastline is a premonition for a storm.

If a more accurate weather prediction is required, the most precise method is cloud observation. If you study them carefully they comprise three tiers, with some clouds rising vertically.

Clouds in the highest level

Cirrus: Very fine, white feathery clouds that almost look combed over. If these clouds are curvy and organised the weather will be fine, but if they appear banded or spread chaotically they can gather and form rainclouds and start a shower.
Cirrostratus: Looks like a veil of cotton curtaining the sky. They cause halos around the sun and moon, which is a sign of imminent rain.
Cirrocumulus: Looks like a spread of seashells on a beach. If you find these clouds over a beach in winter, it will rain soon.

Clouds in the middle level

Altocumulus: Either appears as an ordered stream of rounded clouds, or looks like a herd of sheep. If these clouds shrink in size, the weather gets better (and vice versa).
Altostratus: Shaped like streaks of veil across the sky. They are often light grey or very dark. If they become thicker or sink to a lower level, it is a sign that the weather will be cloudy with a chance of rain.
Nimbostratus: The common “raincloud”, bringing rain and snow.

Clouds in the lowest level

Stratocumulus: Clumps of clouds that appear in layers without clear boundaries. You can see clear sky through gaps between them. If you can see clouds that were cumulus in the afternoon changing to stratocumulus by sunset, the weather will be great the next day.
Stratus: Looks like fog covering a low sky. If they come in the morning and disappear by night, that day will be clear. However, if they lie between altostratus and a canyon, it will rain.

Clouds that rise vertically

Cumulus: Fluffy clouds that you can see on a clear sky. If they disappear by evening the next day is clear, but if they can be seen late at night or float north-westerly, it is a sign that it will rain.
Cumulonimbus: Massive cloud pillars that rise to the level of cirrus. It always brings heavy rain and sometimes a thunderstorm.

If you know how to observe and analyse cloud patterns, you can predict the weather even when stranded on a desert island.

Science & Nature

How To Make Fire

Posted on 23/05/201112/02/2019 by Jinavie

Fire has been the single most useful tool in the history of mankind – something that truly separates us from other animals. Yet, when stranded in the wild, most people are incapable of making fire as the comfort of technology has robbed us of the skill.

Obviously the easiest method is a lighter or matches.
The next easiest method is striking a flint with a knife, piece of steel or another flint. However, flints are not easy to recognise in nature unless you have experience. The following methods use minimum equipments that can often be found in the wild.
Note that you must have dry tinder to catch the spark and kindling to start the fire. Tinder is any easily combustible material that is light and fluffy, so that it quickly burns up after catching the spark.

There are two main methods: sunlight and friction.

Sunlight can be focused to create a spot of intense heat. This is a phenomenon even children use to burn things (such as insects). Instead of a magnifying glass, you can disassemble a camera to take the lens out, or use a plastic bag filled with water to make a crude convex lens.

The other method involves rubbing two pieces of wood rapidly. There are many ways to do this, with some methods being easier and faster.
The most crude method is the hand drill, often the first thing people associate to firemaking. This is when you simply rub a wooden stick in a notch in a fire board (larger piece of wood). Do this by spinning the shaft between your two palms in a fast motion. The tinder is put where it is being rubbed so that it starts burning when enough heat builds.
This is actually surprisingly tiring and hard to make fire with, so an improved method called the bow drill is used more often. This uses the same methods, but instead of your hands, you make a bow and wrap the bowstring around the shaft. This lets you spin the shaft with long forward-and-backward motions, lessening the burden. Putting a piece of wood or rock on top of the stick also prevents hurting the supporting hand.

Lastly, the fire plough method can be used. Here a groove is cut into a fire board, and a long stick is rubbed along it in a ploughing motion. The hot charcoal made is transferred to the tinder.

Once the tinder is smouldering, blow into it or swing the tinder to aerate it, fuelling the fire. This will cause the tinder to light up, which can be put in the kindling to start a fire. Slowly feed the fire with firewood (too much and you will smother it) while giving it plenty of air.
Now, you have warmth, light and hot food.

Science & Nature

Bamboo

Posted on 27/03/201111/02/2019 by Jinavie

There is a bamboo forest on a desert island. How can you use these?

If you cut a section of bamboo so that one side is open, one side is closed, it becomes a cup.
If you cut a section of bamboo and split it lengthwise, it becomes a dish.
If you cut a section of bamboo and cut a wide hole in the side, it becomes a pot.
If you cut a section of bamboo and fit a large rock on one end, it becomes a hammer.
If you cut a branch of bamboo and craft it, it can be a spoon, fork or chopsticks.
If you take a stick of bamboo and tie a string and hook at the end, it becomes a fishing rod.
If you take a stick of bamboo and sharpen the end, it becomes a spear.
If you take many large bamboo and tie them together, you can make a house, a bed or a raft to escape in.

The most important rule of survival is application.

As an addendum, bamboo is a grass (the largest in the world), not a tree.
This is because its stalk has become hardened yet still hollow, making it look like a tree. However, it has segments, shallow roots and dies after flowering (which can take decades) that are features of grass.

Science & Nature

Locust

Posted on 20/02/201111/02/2019 by Jinavie

Locusts are a well-known symbol of destruction. The path of a locust swarm is bound to be left bare with nothing in sight. The most amazing feature of this insect is its reproductive abilities, which can be considered explosive. Furthermore, increased tactile stimulation of a locust’s hindleg causes it to release a neurotransmitter called serotonin, which causes mutual attraction, change of colour and increased consumption of food, thus priming them for reproduction. This allows them to reproduce even faster as the population grows, letting it easily reach numbers of billions in a short time. A large population then causes the locusts to swarm and migrate, and some species can cover distances of up to 500km. These swarms have been known to cover over 1000 square kilometres of land, and any food source in its path is instantly eaten up and used as fuel for reproduction. Because of this, locusts have become an icon of horror and destruction since ancient times as it can destroy crop fields within a matter of hours. This symbol is employed by the bible also, for example as the eighth plague of Egypt.

In some ways, a locust swarm can be seen as natural selection at its best. Explosive reproduction and voracious appetite is the basics of survival, skills that allow a species to beat the fierce competition of “the survival of the fittest”. Although humans curse locusts for destroying crop, they are not the only species that breed thoughtlessly and consume all resources in their path.