Author: Anupum Pant

Brazil Nut Effect – Saving Lives in Snow

By Anupum Pant

The effect

Have you ever noticed that the larger nuts (Brazil Nuts) in your Muesli boxes or bowls end up on the top? It turns out, scientists have a name for this effect. They call it the Brazil Nut effect or Muesli Effect. Well, actually scientists prefer to call it Granular convection.

If you haven’t heard of Muesli, think of a bowl full of random nuts. Or Indians could think of the Haldiram Navratan Mix – A popular snack mixture that contains several types of fried ingredients in various sizes. Irrespective of the kind of snack or even a mixture of sand you think of, it shouldn’t come as a surprise to you that the smallest of particles always end up at the bottom of a mixture when shaken enough.

If you think there is nothing cool about this effect, you are probably picturing it wrong. Watch this video where, on shaking, big marbles magically come on top of a rice heap.

Research studies

Normally, isn’t it common sense to assume that the largest (presumably the heaviest also) particles should end up at the bottom? Such is the counter-intuitive motion of particles in granular mixtures that it gives scientists a great insight about the real physics that goes inside. So they love to study more about this phenomenon.

This effect is so popular among scientists that some have studied it in martian and lunar gravity simulations. To do this they had to go on a plane that moves in parabolic arcs to simulate a specific reduced gravity conditions – A reduced gravity aircraft.

It saves lives

In the snow, sport persons or people taking part in extreme sports carry an avalanche safety bag with them.  On a free ride down a snowy cliff, sometimes these people get caught in avalanches. Being on top when the avalanche has settled helps the rescue teams find them. The avalanche safety bags are huge when they are inflated. And thanks to the Brazil Nut effect, these big bags attached to the sports person, often end up on the top.

The Reverse Brazil Nut Effect

And sometimes there is a reverse Brazil nut effect. Meaning, if certain conditions are met, the largest nuts can end up at the bottom of a container.

The shape of the nuts, shape of the container and the relative sizes of nuts plays a role in determining if the effect reverses or not. As a simple example, using cone shaped container reverses the effect.

Related articles
Enhanced by Zemanta

Halo Effect – Helping You Make Poor Judgements

By Anupum Pant

Despite being well aware of the adage – “Don’t judge a book by its cover” – our not-so-smart-brains fail us on this every time. Unknowingly, humans are prone to the Halo effect. And they’ll even deny that this harmless looking effect was what led them to make a wrong judgement about someone or something.

Halo Effect: In simple terms, we create a whole fake image about anything in our minds, based on a single trait.  For instance:

  1. Don’t you thing Steve Jobs must have been a perfect human being in person? I’m not saying he wasn’t, may be he was. Assuming you never met him, what made you construct that image of his, in your mind? Probably his warm, friendly presentations. Or it is even possible that the seemingly flawless physical designs of Apple products did that trick. Often marketers use this effect to create a warm image of themselves in the audience’s mind by saying little of any substance.
  2. By the good looks of this website, which I’ve made sure are really good, you’d unknowingly judge it as a page presenting you with quality content. You might do this without even looking at the content. May be it really is good content in this case, but it isn’t always.
  3. A well known brand that releases good commercials is often believed to be a quality brand. You’d feel no pain in shelling out thousands of bucks for a simple pair of shoes, saying it is a good quality shoe and will last long. There is a chance that you’ve never really looked deeper into the quality of the shoes this company makes. You’ll simply trust them because of the world-class commercials they come out with – which of course are only a result of outsourcing of creative work to a professional company. Which is not to say that the company really does make poor quality shoes. May be it doesn’t. But you just made a snap judgement without enough information.

The name Halo effect:
Its called the Halo effect because of this general tendency among us to make a snap judgement about the overall good traits of a person by just looking at a halo painted on top of their heads (one good trait of their’s).

But here is the catch, it works both ways:

Suppose you dislike one thing about something, you’ll build an image of “bad” around it, in your mind. This has been tested widely and it is true. People unknowingly do it and don’t realize why they did it. Moreover they’ll deny that it affects them.

Suppose you go to a restaurant and see that there is nothing fancy inside – naked tables, poorly dressed waiters and shabby flooring – you’ll never expect tasty food coming out of its kitchen.

Same thing happens with poorly designed websites. The content isn’t considered credible if they don’t look good. That is one reason, I take time to muster up good-looking images for my featured section.

[Read more]

Related articles
Enhanced by Zemanta

Cryoseism – Frost Quakes in Canada

By Anupum Pant

Note: Remember that the ideas I share on this blog everyday don’t magically get formed in my brain. I’m no genius. What I am, is an average curious person. I read about things and then I experience a burning urge to find out more. I think of this blog as a record of everything I learn – kind of a public journal (NOT an Official gazette). I hope it helps you in some way. If it does, do mention it in the comments section below.

The Polar Vortex

For the past few days, in most of the things I’ve read, I’ve come across a reference to the extremely cold polar winds (incredible pictures) people are experiencing in the United States and Canada. 50 states have gone sub-zero in the US. Similarly, Canada is experiencing even  colder temperatures. While some have decided to stay at home, others are tossing boiling water to try out the Mpemba effect in the open. 8,500 miles away, almost sweating in a room with temperature 30 degrees (Celsius) above zero, I’m learning about new frost related phenomena that I had never heard of before.

My sympathies to the people who are suffering this bitter cold wave. 

Cryoseism

Thanks to the frost, I’m coming across some of the never-before-heard things that are appearing in the mainstream media. One of them which I came across yesterday was – Cryoseism or an Ice-quake.

People in Toronto woke up to loud sounds and rattling objects yesterday. People thought that an earthquake had hit Toronto. It wasn’t an earthquake. What they were experiencing was an Ice quake or Cryoseism.

What caused it?

Expanding water can be an extremely powerful force. It can break the strongest materials ever made. Industrial valves and pipes made of thick steel walls can be fractured by water as it expands. In this case, the earth got split open by it.

Unlike most other liquids, water expands on it freezing. Thus, ice formed is of higher volume and lower density. Although we aren’t dealing with density here, it is interesting to know, the phenomenon of expanding water is what makes gargantuan icebergs float on water. Apparently, there is nothing in the world that can contain expanding water without getting fractured (if you know about something that can, inform me in the comments section below). For a live demonstration, you can have a look at the video below, in which a metal pipe is split by freezing water.

This is what happened in Toronto. Water below the surface froze. As a result, it expanded and fractured the surface with a boom to find space for the 10% increase in volume. This was a Cryoseism.

With loud sounds some people have reported distant flashing lights. What was that about?

Electrical changes happen in the rocks when they get squeezed, pushed and rubbed around when pressure stored in the ground is released. The flashing lights are most definitely caused by these electrical changes due to rubbing and squeezing of rocks.

In the past the north and north-eastern parts of US have also reported such quakes.

Related articles
Enhanced by Zemanta

Valporate – Performance Enhancing Drug for Perfect Pitch

By Anupum Pant

Today we find out if it would be a good idea to impress your friends during the next gathering by hacking your brain with pills to learn a rare ability fairly quickly. But first, pay attention to the following jargon.

Perfect pitch

Perfect pitch is an exceptional ability among few gifted humans that enables them to recognize and re-create the pitch of a musical note instantly without the help of any external reference. There have been no cases of adults learning this ability by practice. However, pseudo absolute pitch can be learnt with great practice and only retained through regular use.

Brain plasticity

Learning to recognize musical notes, or any other ability for that matter can be reasonably easy at an early age due to a brain’s plastic state. The brain’s ability to change and adapt as a result of experience is far better at younger ages. As people age, they lose the ability to learn like kids.

For instance, picture the rate at which infants learn language. By the time they turn 2 – 4 years old, they start using thousands of words. Try learning a new language at the age of 35. It is tough.

However, a new research suggests that this state of brain can be recovered by using drugs. One such drug, according to Dr. Takao Hensch is Valporate.

Is Valporate a Performance Enhancing Drug?

No! it is not a performance enhancing drug. Valporate or Valporic acid is a drug sold under the common names – Depakote, Depacon and Stavzor. For several years it has been used to treat various disorders from migraines to bipolar disorder. It is a chemical substance that can cross the blood–brain barrier. As a result, it has the power to affect an individual’s perception, mood, consciousness, cognition, and behavior.

Dr. Takao Hensch, a Harvard University professor, recently published a study which tested the effects of Valporate on 23 healthy male subjects for two weeks. None of them had a musical experience. During this period they were trained in music. At the end of this study, researchers found that these 23 men did remarkably better than an average adult would do, at perfect pitch tests.

In the future

He thinks, may be 10 years down the line, this drug could be used to enhance other learning abilities like language learning among adults, by changing the state of their brains.

Presently, studies on how the brain changes at cellular level when this drug is taken are underway. Also, Dr. Hensch thinks that humans have evolved to experience these learning stages for a reason. If it is okay to mess around with it, is still being studied. At this stage, trying this out at home can be extremely risky. It would be wise for us to wait for scientists to come out with a comprehensive study on the effects of this drug.

Related articles

 

Enhanced by Zemanta

Darkness Is Good For You

By Anupum Pant

It is astounding how the tiniest things can affect your life greatly. Who would have thought that sleeping with lights on can change you into a completely different person, over time?

Sleeping with lights on, or simply not getting enough exposure to darkness can have long-lasting effects. Darkness is good for you.

Melatonin – The Darkness Hormone

Melatonin is a hormone found in all living creatures from the most basic ones to humans. Melatonin is produced in the pineal gland (a part of the brain), by the retina, lens and GI tract. Production of melatonin is influenced by the information received from the retina about the daily pattern of light and darkness. It is primarily secreted when the information of “darkness” is obtained by the gland.

Its Effects

Its levels vary in a daily cycle. In humans, it plays a role in the regulation of several biological functions. Three of its functions we are interested in here are – its effect on out mood, performance and aging process.

Aging, behavior and memory effects:
According to one study, in mice that were aged artificially, Melatonin had immense anti-aging effects. In a similar study, the combined effect of physical exercise and increase in of Melatonin concentration led to improvements in behavior, learning and memory.

Studies on humans have also produced results on similar lines. The hormone’s effect on mood, performance, memory and visual sensitivity were assessed among 14 healthy men in a study carried out at MIT. It was found that externally administered Melatonin had a significant but short acting sedative-like effect on humans. In terms of mood, it had a calming effect.

Anti-Cancer effects:
Melatonin causes cancer cells to self-destruct. The hormone also boosts your production of substances that make your immune system stronger. As a result, your system gets better at identifying and attacking mutated cells that lead to bad cancer.

Other effects:
Melatonin’s effect is not just limited to that. It plays a great role in decreasing Heart Diseases, Headaches, Diabetes and Osteoporosis too. And more…

Improving your Melatonin production

  • Avoid screen time during the last few hours of your day before going to bed.
  • Avoid using any sort of night-light or bed-side lamp. Sleep in complete darkness.
  • Avoid waking up abruptly due to loud alarms or bright light. Use a crescendo for alarms.
  • Sleep away from your phone.
  • Maintain a set light and dark, wake and sleep rhythm.
  • Most important of all, to optimize the production of this hormone, you need exposure to bright sunlight during the day. Unlike what just-the-headline suggests, it is important to note that you are not doing yourself any good by lying in darkness all the time. There has to be a continuous rhythm of light and darkness.
Related articles

 

Enhanced by Zemanta

Scientifically, Do Retina Displays Make Sense?

By Anupum Pant

Our eye doesn’t work like a camera – with pixels and frame rates. It moves rapidly in small amounts and continuously updates the image to “paint” the detail. Also, since we have two eyes, both the signals are combined by the brain to increase the resolution further. Due to this, a much higher resolution image than possible with the eye’s abilities, can be generated in the brain. The very fact that we haven’t been able to come up with artificial devices that work the way a human eye does, confirms that we haven’t been completely able to understand this complex device yet.

But what we know about the average human eye is that its ability to distinguish between two points is measured to be around 20 arcsecs. That means, two points need to subtend an angle of at least 0.005 degrees to be distinguished by the human eye. Points lying any closer than that would mean that the eye would see it as a single point.

One thing needs to be noted that if an object subtends 0.005 degrees when it lies 1 foot away, it will subtend a lesser angle as it moves away. This is the reason you have to bring tiny text closer in order to read it. Bringing it closer increases the angle it subtends, only then the eye is able to resolve individual letters. Or in other words, anything is sharp enough if it is far enough.

Apple Science

Retina display, the Apple’s flagship display is said to be so sharp that the human eye is unable to distinguish between pixels at a typical viewing distance. As Steve Jobs said:

It turns out there’s a magic number right around 300 pixels per inch, that when you hold something around to 10 to 12 inches away from your eyes, is the limit of the human retina to differentiate the pixels. Given a large enough viewing distance, all displays eventually become retina.

Basically, Apple has done science at home and has come out with a nice number, 300 PPI. Practically, you don’t need anything higher than that. Technically, you do.

Isn’t “more” better?

No one is really sure. According to my calculations, an iPhone 5s’s display (3.5X2 in) would subtend 13.3 degree X 7.6 degrees from a 15 inch distance. With the kind of resolving power our eye sports, you’d need a screen that is able to display 4 megapixels on that small screen. Or in layman words, you need a screen that can pack around 710 PPI; practically, that sounds a bit too extreme (or maybe my calculations are wrong, please point it in the comments). I’d go with Steve Job’s calculation.

My shitty screen is a retina display

So, technically any device can said to be sporting the most touted screen in the industry today – a retina display – if it is kept at a sufficient distance. For instance, my laptop’s monitor with a resolution less than one quarters (~110 PPI) of what we see on today’s devices becomes a retina display when I use it from a distance of about 80 cm. 80 cm is normally also the distance I use my laptop from. Also, even doctors consider 50-70 cm as an optimum distance from screen to eye, to avoid eye strain.

On my shitty screen, the pixels are at a distance of 0.23 mm from center to center. And at 80 cm, my eye is practically unable to see the difference between a retina display and a shitty display. So, I say, do you really need higher and higher PPI devices? But that is just my opinion.

My Shitty phone is a retina display

As phones are generally used from a much closer distance, they require a higher PPI for the screen to look crisp. My phone, Lumia 520 has a 233 PPI screen. It becomes a retina display after a distance that is anything more than 15 inches. I’m required to hold my phone at 4 inches more than an iPhone to turn it into a display which is as good as an iPhone’s. Do I bring my phone any closer for anything? No. Do I need a higher PPI? No.

Conclusion

Recent phones from Samsung, Nokia and HTC pack in 316, 332 and 440 ppi, etc or more. Companies are spending billions to decrease the distance between their pixels. Sony, for instance, has recently come up with a 440 PPI display. And now, we have 4K TVs. Practically, I’d say, put an end to this manufacturer pissing contest and use this money for something more worthwhile. Technically, according to calculations, I say that we yet have to develop far more complicated technologies to cram in more pixels for pleasing the human eye.

Related articles
Enhanced by Zemanta

Working Memory – Chimpanzees vs. Humans

By Anupum Pant

At least in one known cognitive area, chimpanzees prove to be far smarter than human beings. While it is possible for humans to train themselves up to some extent at it, they lack the capacity for an excellent working memory. On the other hand, chimps naturally display a remarkable working memory.

So, naturally the next question we’d ask – what exactly is working memory and how can I beat chimps at it?

But before that is answered, let us have a look at this study conducted by Japanese scientists.
In the study, scientists use a test where numbers from 1 to 9 are arranged on a screen randomly. The test taker is given a chance to remember all the nine positions. When the subject is ready, the areas go blank and the user is required to recall all the nine numbers in sequence. One mistake and the subject has to start over. In the test, we see this chimpanzee named Ayumu showing remarkable ability in terms of working memory. The opponent human loses badly.

BTW at this test, the chimp Ayumu, can now recall 19 numbers in sequence without making a single mistake. Not just Ayumu, this knack is observed in all chimps.

Why?

As the researcher mentions, chimps are not the same as humans. Both humans and chimps had a common ancestor several millions of years ago. Now, both of these species have evolved in their own ways for all these years. While they’ve gotten good at something, we’ve picked up different abilities. You don’t have to feel bad about it.

This ability to actively hold multiple pieces of information in the mind and play with them has helped these chimps to survive in the wild by helping them to make quick decisions. As a result, they have evolved to master it.

Training + Caveat

Although you can train yourself to have an amazing working memory, you’ll probably never be able to beat chimps. Also, you should know that very few humans have a nearly equal level of working memory as compared to chimps, and these are the people who are affected by a mental disability called the Savant syndrome. It is beyond common humans to train themselves to chimp-level-working memory.

A game known as n-back, used as a test and an exercise tool can help you to master your working memory. The game starts easy. Then you move on to the second level where things straight away move from easy to difficult. The next levels seem impossible at first. But it has been proved that this game can help you to improve your working memory. The harder you train, the better you get at it; of course, never as good as Ayumu.

Related articles
Enhanced by Zemanta

Human Skin and Permanent Tattoos

Our skin is huge. It is so big that it is larger than any of our organs. Yes, skin is the largest organ in our body. Still, we have never heard some of the most striking things about the human skin. Let us take a few minutes to skim through them before we talk about permanent tattoos.

Weight and Area: If our skin was cut and laid on the floor, it would cover an area of about 1.5 to 2 m2. If weighed on a scale, it would independently weigh about 3.5 kg (about 5% of your body weight).
To give you a perspective about its area, the same area in some posh localities of Mumbai would cost around $35000. Anyway, it sounds senseless to compare our skin’s area with real estate. So, given that no one has been able to artificially create an exact replica of it, I can’t really put a cost on it now. Let us talk about a nice estimation of its cost in the future. In terms of many functions it performs for our body, – a personal air conditioner, heater, shield, sensor, moisturizer etc – our skin, no doubt, is an invaluable asset.

In short, it is always good to think carefully about it, when you are planning a construction on this precious piece of real estate. Because bringing it down is going to be difficult.

Permanent Tattoos

To understand how permanent tattoos work, you need to understand the basic structure of skin.

Layers: Broadly, there are 3 main layers of skin – The Epidermis, Dermis and Hypodermis. The thickness varies at different parts. For instance, it is the thinnest at our eye-lids. Thinner skin is lighter. This enables you to complete the wink, in the wink of an eye.

Why Permanent?
Permanent tattoos on skin are permanent because of the 3 different layers. To put a tattoo on your skin a mechanized needle punctures your epidermis and sends colored particles to the epidermis. The body thinks of it as a damage that has been done to the body, and sends white blood cells to capture the color particles. But these particles are too big to be eaten by the white blood cells. As a result, they stay there permanently.

Why Avoid?

  1. It is not really Permanent: Later in your life, as the pigment moves and the folds of skin change, the “permanent tattoos” lose their sharpness. They start fading or get distorted. But a hazy and pointless mark remains there permanently.  At this point, people start regretting about their early life decisions. They start looking for methods to get rid of these hazy marks. Now, an expensive laser treatment seems like the best idea.
  2. Tattoos can kill you: While itching, swelling, rashes, bumps, and other skin reactions due to tattoos are very common; it should be known that tattoos can also kill you. Poorly made tattoo ink can contain hazardous chemicals which range from potentially carcinogenic substances to the presence of lead. Moreover, a wrong needle pierced at the wrong places, like your spine, could prove to be deadly. You don’t want these pigments in your blood stream.
    HIV or hepatitis from an infected needle can be another concern. But dying from a tattoo is extremely rare.
  3. Professional career: Also visible permanent tattoos aren’t good for your professional career. Most employees think it’s unacceptable for tattoos by be visible while at work. Also it is believed that tattoos should be covered up for a job interview.
  4. Tattoo removal can be expensive. Plus most of the time these methods don’t do their job perfectly. Often, permanent coloration is left after removal.
  5. This is not an exhaustive list. So, Etc…

It is a good idea to find some other way to prove your love.

If you are wondering why I wrote this – It was a side-effect of an effort to find a few common things in the randomness that I came across today while researching for a completely different article. Although the article might seem absurd, you can’t refute that it does teach you at least one new thing, for the day.

Related articles
Enhanced by Zemanta

So, What Does The Fox Say?

By Anupum Pant

One of the most popular videos on YouTube last year was a song sung by two Norwegian brothers titled, The Fox. I’m not sure what was it exactly that made the video go viral, which is not to say that it wasn’t funny.

I think it was those absurd lyrics dropped at a time when you expect something serious, made it so popular. With an infectious catchy tune, the lyrics of this song seem very childish and at the same time, it is sung in a serious tone.
Popularity kept aside for a while, the number poses an important question which not many of us must have considered – What does the fox say? Makes us go looking for answers, doesn’t it?

As scientists would put it, the question this song poses, is indeed a challenging one. It isn’t easy to generally vocalize the sound made by a fox. Also, foxes make variation of sounds for different situations. Moreover, that, there are varieties of foxes out there, makes it even more difficult to answer the question.

The high pitched bark:
For instance, the red fox, which is the most common variety of fox, screams in a high-pitched bark. It sounds like a woman screaming in distress. In words, it sounds like a YAAGGAGHHGHHHHH. And is exactly the reason we aren’t taught this at school. Imagine, the teacher teaching with a YAAGGAGHHGHHHHH in a classroom.

The bird like sound:
When they fight, foxes can sound like birds. Unlike the screams discussed above, these sounds aren’t heard for long distances. Little fox pups also make these guttural sounds when they play. The sound is called Gekkering.

The high-pitched howl:
When greeting a more powerful foxes, weaker ones make a very high-pitched howl that can be heard for several kilometers.

Apart from these broad categories, they make several other subtle variations for different situations. The video below has a good collection of fox sounds:

On that note

What do you think the Cheetah says? Most of us have seen a cheetah (probably at the zoo), but not many must have heard it talk. It may come as a surprise to you that Cheetahs chirp like birds. Or you could call it more of a cat-fight sound.

Related articles
Enhanced by Zemanta

Pacific Leaping Blenny – Fish Lives on Land

By Anupum Pant

Scientific name: Alticus arnoldorum

After having seen animals that live on for centuries, fish that have legs and several others, another fascinating animal joins the list at AweSci today. The Pacific Leaping Blenny – A fish that, unlike every other extant specie of fish, lives on land.

Wait! What?

The Pacific Leaping Blenny is a 2-4 inches long fish that is found on reefs in Samoa, Marianas, Society, and Cook Islands, in the western and southern Pacific Ocean. For all its life, this fish stays on land. It breathes through its gills and partly through its skin.

During the few hours when the tide is at a normal level, such that the waves are just strong enough to reach them and not enough to pull them back into water, these fish take care of their business on land. They need the water to hit them because it keeps their skin wet. Which in turn, lets them breathe through their gills and skin. As long as their skin is moist, they can live out of water indefinitely. So much that they have been officially classified as a terrestrial specie. They would suffocate if their skin dries off completely.

Their fascinating camouflage

It is fascinating to see an existing example of how ancient sea dwelling creatures must have first evolved. At these times when we have great predators waiting on land to immediately end this transitional specie, this fish does a great job of hiding itself from them. And given their poor speed on land, that is how they survive on these rocky shores. They have developed a specialized kind of camouflage that makes it difficult for a predator to find and kill them. As you can see in the picture above, they have a skin color that matches very well with the surrounding reefs/rocks.

How do they move on land?

Since they don’t have legs, that is exactly the question that hit my mind when I first read about these creatures. Turns out, for movement on land, they have developed a very peculiar kind of a movement style. They twist their tails, load up the tension and then release to leap. This sequence happens too quickly to notice easily through naked eyes. So, picked off directly from the Wikipedia page, here we have a slow motion video of this fish leaping off.

Related articles
Enhanced by Zemanta

Tritonia Khaleesi – New Slug Named After the Mother of Dragons

By Anupum Pant

Wish you a Happy 2014

It’s the last day of the year! What am I doing?
I’m writing this blog-post while everyone in the city is partying. That might sound like a sad thing, but I like to think of celebration as something that isn’t the same for everyone.
For instance, think of the sea slugs for a moment. The last day of the year means nothing to them. Even when it is party time for everyone else, they do the thing they do every day. Although it makes sense here, sea slug is not to be confused with the first generation British surface-to-air missile.
Anyway, I wish all of my readers a very happy and a successful 2014. If you need some help with sticking to New Year resolutions, you could check this out – [Help!]

So, talking about sea slugs – A sea slug can be thought of as a type of a snail, without a shell living in the sea. But, why am I talking about sea slugs suddenly? There is a reason.

A new sea slug

Felipe de Vasconcelos Silva, Victor Manuel De Azevedo, and Helena Matthews-Cascon from the Federal University of Ceará discovered a new kind of sea slug off the coast of north-east Brazil. They decided to name it Tritonia khaleesi.
If it doesn’t ring a bell, it is probably because you do not watch Game of Thrones on TV. They named it after the mother of dragons, Khaleesi, from the Game of thrones – a fantasy drama television series which is an adaptation of A Song of Ice and Fire, George R. R. Martin’s series of fantasy novels.

Why did they name it that?

If I may quote the scientists themselves, their words pretty much answer this question:

The standard of the silver band on the back of the slug reminds braids Khaleesi of silver hair, especially in the last episode of the first season of the show. Besides silver color, the species is one of the smallest sea slugs, as well as Khaleesi is also described as low and new.

What did you learn?

Well, Several things! Things like:

  1. Scientific names can be after character names from TV shows or fantasy novels.
  2. The British called their first generation surface-to-air missile – Sea Slug.
  3. New species are being discovered even today. BTW, it is estimated that 86% of the species still living on earth are still waiting to get discovered.
  4. And of course, the new sea slug is named after Khaleesi.
Related articles
Enhanced by Zemanta

The Underwater Optical Man-hole

By Anupum Pant

Agreed, sometimes, when you find yourself being interrogated in a room covered with one-way mirrors, you can’t see the people who are observing you; Instead, you see yourself in the mirrors. Otherwise, If you can see something, it seems normal to assume that the thing can see you too.

A trout’s window to the outside world is something similar to what a person in the interrogation room experiences. However, unlike the person, a fish can actually see things that are out of the water, but the view is very limited.

The Snell’s Window

When a fish looks up from water, it sees only a circular window of light, from under the water surface. Everything that lies outside of this circle is darker. This darker area of vision is replaced by the reflection of the sea/lake bed (where there is no source of light to illuminate it). This effect isn’t due to any limitations of a fish’s eye. In fact, even human divers see only a circle of light when they are under water. This circle is called the Snell’s Window or the optical man-hole.

Irrespective of the fish’s visual acuity, some physical properties of water and air get together and have a great effects on what a fish can see. It sees a circle with diameter calculated by the Snell’s equation.
In short, the window is about 2.3 times as wide as the fish’s depth. So, a fish can see more if it goes deeper. At a depth of 1 meter, it can clearly see things on a circle that is 2.3 m wide on the surface of water.

So, even if you can see a fish in water, it will be foolish to assume that the fish can see you too. Some times it can’t. It looks something like this from under water:

In Wikipedia’s words:

Snell’s window is a phenomenon by which an underwater viewer sees everything above the surface through a cone of light of width of about 96 degrees.

Why does it happen?

It happens due to a simple optical phenomenon called the total internal reflection.
The physics behind this phenomenon can be read here. [Read here]

Related articles
Enhanced by Zemanta

The Woodpecker Tongue is a Crazy Weird Instrument

By Anupum Pant

Almost everyone who has learned it in school or has experienced a sleepless night listening to a woodpecker make that tat-tat noise, knows that their straight and strong beaks, are indeed able to make heads turn. These chisel-like tools help them to pierce into dead wood where they may find their food – insects and larvae. They also use these bores as nesting cavities. But that isn’t the only fascinating thing about a woodpecker.

Oftentimes, a woodpecker has to use its secret tool to deal with annoying little bugs that evade the reach of its beak by moving further into a bore – The crazy woodpecker tongue.

Annoying bugs

Present just behind a thick layer of wood are these wood-boring beetles that a woodpecker would love to eat. While hunting for these kind of grubs the strange potential of the woodpecker’s tongue can be noticed. These beetles drill several inches deep into the bore. The woodpecker’s beak helps the bird breach into their homes, but it is only the woodpecker’s tongue that is able to catch and retrieve bugs from deep inside the bores.

Woodpecker’s tongue

A woodpecker’s tongue can reach up to 3 times the length of its beak. It is thin like a spear, and on it are tiny hooks facing up and backwards. The harpoon like tongue can move at incredible speeds and serves two functions – listening and striking. Yes, the tongue can actually listen and track insects inside the bore.

The hooks on its tongue are covered in sticky saliva. This combination of hooks and saliva does not leave a chance for the insects to wriggle off once they are pierced. When the woodpecker’s bill opens up the beetle home, it extends its tongue and probes around to track them. If it locates grubs, the woodpecker skewers the prey with its tongue, the tip of which is hard and sharp. After the tip penetrates the larvae body, the tiny rear-facing hooks hold them in place as the woodpecker retracts its tongue.

Okay! the last mindblow

Sometimes the woodpecker tongue is so long that it forks in the throat, goes below the jaw, then behind the head and finally over the top of its brain, where it rejoins and goes into the right nostril.
Have a nice look at the picture below till I rest my brain for tomorrow’s article.

woodpecker tongue
Woodpecker tongue. Source: Hilton Pond
Related articles
Enhanced by Zemanta

Tsutomu Yamaguchi Survived Two Nuclear Bombs

By Anupum Pant

Two nuclear bomb blasts which resulted in a complete annihilation of two Japanese cities, Hiroshima and Nagasaki, involved deadly X-ray-heated fireballs sending off a shock waves in all directions at a velocity greater than the speed of sound. In theory, no object, living or dead, should have stood straight after the shock wave passed. At least, some person standing at just a 3 km distance from both the places, where Little boy and Fat man were dropped, should have  completely been vaporized; Twice!

Tsutomu Yamaguchi

Tsutomu Yamaguchi didn’t die. He survived the immediate effects of, not one, but two nuclear bombs. Moreover, he was just 3 km away from both the ground zeros. Both of these bombings happened within a three-day span, during which, after having seen the first blast, he found the time to travel to the second site.
Although it is estimated that there are about 160+ such people, no one except Tsutomu Yamaguchi has officially been recognized to have survived both the nuclear bombs.

However he did die due to lung cancer on January 4, 2010. He died at an age of 93. So, technically the bombs didn’t kill him and he lived decades past the average human age.

His Story

First Bomb: Yamaguchi was going back to Nagasaki after a three-month long stay in Hiroshima. On August 6, 1945 when he was heading to the railway station to catch the train to Nagasaki, he found out that he’d forgotten his travel pass. He went back to take it. It was on his way back to the station (the second time), he saw the bomb falling down with a parachute. An instant later, everything went white. He was temporarily blinded, his ear drums got ruptured and he was burnt all over.

Second Bomb: With great difficulty he made it to an air-raid shelter, spent the night there and left for Nagasaki the next morning.Three days later, on August 9th, he thought he was fine to go back to work. At work, When he was explaining his burns to his boss who was listening in disbelief, the second air raid happened. Again, it was the same blinding lights that fell over this city now. Luckily, the second time he wasn’t affected with as many injuries.  However, he had been exposed  to a huge radiation dose which probably caused the cancer that killed him.

Isn’t is fascinating how millions of tiny little events had to happen at the right time and place for Yamaguchi to see and survive both of the nuclear bombs.

[Read More]

Related articles
Enhanced by Zemanta

Myths on Facebook – Negative Calorie Foods

By Anupum Pant

I have never felt the necessity to pay attention to diet related news/facts till date (now I do).
So, never in my life had I read the phrase “negative calorie foods”, until yesterday, when a friend posted the following “WTF fact” on Facebook:

Celery has negative calories! It takes more calories to eat a piece of celery than the celery has in it.

BS! I cried, and like with everything I read on the internet, I was skeptical about this too. Hence, I decided to investigate. Here is what I found out.

Negative Calories in theory

Theoretically, it is indeed possible for edible items to be negative calorie foods. It works this way.

The body takes more calories to process a negative calorie food item than it (the food item) provides to the body. That basically means that you can sit all day, eat celery, fill your tummy and still keep losing weight. Sounds too good to be true. Exactly!

A Myth

It has been proved once and again that the number of calories your body burns while processing food is tiny when compared with the calories in that food item. So, scientists haven’t yet found a truly “negative calorie” food item.
For instance, a stalk of celery provides 6 calories to the body, but the body expends only half of a single calorie digesting it. That is +five and half calories. As expected, It isn’t negative. In fact, none of the foods advertised have been conclusively proved as actually negative calorie foods. Except one, which again, isn’t really food.

Ice cold water is the only known negative calorie thing you can ingest. It needs more amount of calories to get processed in the body than it give the body.  Most of this energy expended by the body goes into warming up the ice-cold water.

Celery is still good

However, that doesn’t mean celery is not a healthy food item. When compared to other greasy things you could ingest, celery of course is a good alternative (if you are looking to eat healthy). In terms of calorie intake, you’ll be doing great by eating a lot of celery to fill your stomach. But, positive calories mean that you’ll not lose weight unless you get moving. No wonder, virtually every dietitian has a load of celery mentioned in his/her diet plan.

Also, note that, while it is a good food, it isn’t something you could survive on. If you are thinking of trying an only-celery diet, you should know that you’ll be depriving your body of several necessary nutrients by trying that. Consult an informed nutritionist before trying a diet plan.

Finding an informed Nutritionist

To confirm if it is a good nutritionist you are talking to, you could probably test them by innocently inquiring if celery is a negative calorie food item or not. If he/she LOLs and tells you that it is a myth, it would be a good idea to go to them for diet plans.

Related articles
Enhanced by Zemanta