WHY do scorpions have blue blood?
The fact is that the blood of scorpions does not contain hemoglobin, but hemocyanin, its analog. If hemoglobin is an iron-containing substance, then hemocyanin consists of copper.
When in contact with air, this element turns blue and, giving oxygen to tissues, loses its color.
The fact is that the blood of scorpions does not contain hemoglobin, but hemocyanin, its analog. If hemoglobin is an iron-containing substance, then hemocyanin consists of copper.
When in contact with air, this element turns blue and, giving oxygen to tissues, loses its color.
WHY are there no old houses in Japan?
In this country, it is believed that a house loses value from the first day it was built. Within 10 years, such value is halved. After 25 years, it is considered overly old to live in and has no value whatsoever. After that, it is demolished and a new house is built in its place.
Even landmarks and important shrines are regularly rebuilt. That's why there are no examples of old architecture in Japan — all the houses are modern.
In this country, it is believed that a house loses value from the first day it was built. Within 10 years, such value is halved. After 25 years, it is considered overly old to live in and has no value whatsoever. After that, it is demolished and a new house is built in its place.
Even landmarks and important shrines are regularly rebuilt. That's why there are no examples of old architecture in Japan — all the houses are modern.
WHY does a dolphin sleep with one eye open?
Dolphins are able to sleep by alternately turning off one of their hemispheres. The other hemisphere is awake at that moment. Accordingly, one eye is open in order to monitor changes in the environment.
If the right hemisphere sleeps and the left one is awake, the right eye is open. And vice versa.
Dolphins are able to sleep by alternately turning off one of their hemispheres. The other hemisphere is awake at that moment. Accordingly, one eye is open in order to monitor changes in the environment.
If the right hemisphere sleeps and the left one is awake, the right eye is open. And vice versa.
WHY does the British Queen lack of a passport?
Even though the Queen does not have a passport, she is free to travel around the world.
Since UK passports are issued in Her Majesty's name, the Queen does not need one. All other members of the royal family have passports.
Also, the Queen is the only person in Great Britain who is allowed to drive a car without a license.
Even though the Queen does not have a passport, she is free to travel around the world.
Since UK passports are issued in Her Majesty's name, the Queen does not need one. All other members of the royal family have passports.
Also, the Queen is the only person in Great Britain who is allowed to drive a car without a license.
WHY are the veins blue if the blood is red?
The bluish or greenish tint of veins is due to the way light passes through layers of skin and subcutaneous fat. When looking at our arm or leg, we see the picture of light reflected from the tissues.
Skin is weak in transmitting light, unlike blood. Yet red waves of light penetrate the tissues better than blue. Blood, on the other hand, more readily absorbs blue and purple light, which explains why we see it as red. When a blood vessel runs close to the surface of the skin, almost all of the blue light is absorbed by the blood and some of the red light is reflected.
The bluish or greenish tint of veins is due to the way light passes through layers of skin and subcutaneous fat. When looking at our arm or leg, we see the picture of light reflected from the tissues.
Skin is weak in transmitting light, unlike blood. Yet red waves of light penetrate the tissues better than blue. Blood, on the other hand, more readily absorbs blue and purple light, which explains why we see it as red. When a blood vessel runs close to the surface of the skin, almost all of the blue light is absorbed by the blood and some of the red light is reflected.
WHY are Japanese suicide bombers called kamikazes?
The Mongol khan Kublai twice planned an invasion of Japan, and both times he was prevented by violent typhoons.
The Japanese saw this as a help from above and called them "kamikaze," which means "divine wind." And in World War II they used the term to describe suicide pilots.
The Mongol khan Kublai twice planned an invasion of Japan, and both times he was prevented by violent typhoons.
The Japanese saw this as a help from above and called them "kamikaze," which means "divine wind." And in World War II they used the term to describe suicide pilots.
WHY do calculators start at the bottom and the phone starts at the top?
The calculator is the successor of cash registers and mechanical counting machines. That's why the numbers on the calculator from zero to nine are from the bottom to the top.
Until the 1960s, dialing on the telephone was done with a dial. Then tone dialing became possible, and the familiar dial was replaced by buttons.
There were many different attempts: they were arranged in a circle, or in two rows... But as a result, the familiar option was chosen, where the numbers are arranged in three rows in ascending order (from top to bottom).
The calculator is the successor of cash registers and mechanical counting machines. That's why the numbers on the calculator from zero to nine are from the bottom to the top.
Until the 1960s, dialing on the telephone was done with a dial. Then tone dialing became possible, and the familiar dial was replaced by buttons.
There were many different attempts: they were arranged in a circle, or in two rows... But as a result, the familiar option was chosen, where the numbers are arranged in three rows in ascending order (from top to bottom).
WHY are sweet foods sticky?
It's due to the chemical bonding that occurs between sugar and water molecules. The water molecules envelop the sucrose and create a shell. Thus, at high concentrations (like honey, jam, syrup) they form hydrogen bonds with each other.
📌This bonding is what gives the sticky feeling.
It's due to the chemical bonding that occurs between sugar and water molecules. The water molecules envelop the sucrose and create a shell. Thus, at high concentrations (like honey, jam, syrup) they form hydrogen bonds with each other.
📌This bonding is what gives the sticky feeling.
WHY are extroverts and introverts ideal life partners?
➡️ Extroverts tend to be active, sociable people. They easily establish contact with others. They can also be inspiring and encouraging.
➡️ Introverts are quiet ones. Take a long time to think through decisions, analyze all options. Able to avoid problems.
Therefore, calm introvert keeps from making rash decisions, and temperament extrovert rouse the other half.
➡️ Extroverts tend to be active, sociable people. They easily establish contact with others. They can also be inspiring and encouraging.
➡️ Introverts are quiet ones. Take a long time to think through decisions, analyze all options. Able to avoid problems.
Therefore, calm introvert keeps from making rash decisions, and temperament extrovert rouse the other half.
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WHY is everything colored green in night vision devices?
In traditional night vision devices (not thermal imagers), light entering the lens is converted into shades of black and white, and only when it hits the phosphor screen does it take on a greenish hue.
The green gamut is chosen for two reasons:
✔ the human eye is most susceptible to waves of this length.
✔ it is the least tiring to the eye for prolonged exposure.
In traditional night vision devices (not thermal imagers), light entering the lens is converted into shades of black and white, and only when it hits the phosphor screen does it take on a greenish hue.
The green gamut is chosen for two reasons:
✔ the human eye is most susceptible to waves of this length.
✔ it is the least tiring to the eye for prolonged exposure.
WHY are the ribs of coins notched?
Coins used to be valued according to the amount of metal they contained. Fraudsters used to cut the metal off the edges, pocketing the gold and silver. It was incredibly difficult to catch them.
A solution to this problem was suggested by Isaac Newton, who was an employee of the British Royal Mint. He suggested making fine notches on the edges of the coin, which made the worn edges immediately visible.
Coins used to be valued according to the amount of metal they contained. Fraudsters used to cut the metal off the edges, pocketing the gold and silver. It was incredibly difficult to catch them.
A solution to this problem was suggested by Isaac Newton, who was an employee of the British Royal Mint. He suggested making fine notches on the edges of the coin, which made the worn edges immediately visible.
WHY do babies have 70 more bones than adults?
Newborns tend to have about 270 bones, most of which are tiny. This makes the skeleton more flexible and helps the baby get through the birth canal and grow quickly. As they get older, many of these bones fuse together.
📌The adult skeleton consists of an average of 200-213 bones.
Newborns tend to have about 270 bones, most of which are tiny. This makes the skeleton more flexible and helps the baby get through the birth canal and grow quickly. As they get older, many of these bones fuse together.
📌The adult skeleton consists of an average of 200-213 bones.
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WHY do girls blink twice as often as guys?
📌 And it's true, there is a long-standing proven fact by scientists that women blink twice as often.
It is based on the fact that women's nervous system is more impulsive than men's, it also affects blinking.
A long look at the opponent is a proof of dominance, while frequent blinking is vice versa. In addition, emotional details play an important role.
📌 And it's true, there is a long-standing proven fact by scientists that women blink twice as often.
It is based on the fact that women's nervous system is more impulsive than men's, it also affects blinking.
A long look at the opponent is a proof of dominance, while frequent blinking is vice versa. In addition, emotional details play an important role.
WHY do we drink tequila with salt and lemon?
Before drinking tequila, one should lick the salt, then drink the liquor and snack on a slice of lime.
No other liquor is drunk in this way❗
The reason for this ritual is that the salt and lime change the distinctive taste and smell of tequila and emphasize its original flavor.
Before drinking tequila, one should lick the salt, then drink the liquor and snack on a slice of lime.
No other liquor is drunk in this way❗
The reason for this ritual is that the salt and lime change the distinctive taste and smell of tequila and emphasize its original flavor.
WHY are clouds white at night?
A cloud is a collection of water droplets and ice crystals with no color and only partially diffuse light hitting them.
At night, low clouds appear whiter than the sky when the city lights are high.
In contrast, in a dark area, clouds obscure the faint glow of the night sky and appear black.
A cloud is a collection of water droplets and ice crystals with no color and only partially diffuse light hitting them.
At night, low clouds appear whiter than the sky when the city lights are high.
In contrast, in a dark area, clouds obscure the faint glow of the night sky and appear black.
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WHY do men and women hear sounds differently?
Women hear high pitched sounds better than men.
They are also better at recognizing changes in tone than men and therefore know exactly when men are lying😏
Men, on the other hand, specialize in wildlife sounds and hear perfectly well where the sound is coming from. If a woman is the first to hear a kitten's meow, it is the man who will indicate where to look for it.
Women hear high pitched sounds better than men.
They are also better at recognizing changes in tone than men and therefore know exactly when men are lying😏
Men, on the other hand, specialize in wildlife sounds and hear perfectly well where the sound is coming from. If a woman is the first to hear a kitten's meow, it is the man who will indicate where to look for it.
WHY is soap easier to wash off with warm water?
In warm water, molecules are more mobile and more active in interacting with soap molecules, pulling them off the skin and converting into water-suspended droplets.
In this form, detergents are easily removed from the surface along with pollutants inside these "droplets".
In warm water, molecules are more mobile and more active in interacting with soap molecules, pulling them off the skin and converting into water-suspended droplets.
In this form, detergents are easily removed from the surface along with pollutants inside these "droplets".
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WHY do human eyes move in sync?
The coordinated movement of the eyes allows us to build a three-dimensional image of an object and accurately estimate the distance to it.
➡️ But some sedentary animals (chameleons, seahorses) have eyes that can move independently of one another.
The coordinated movement of the eyes allows us to build a three-dimensional image of an object and accurately estimate the distance to it.
➡️ But some sedentary animals (chameleons, seahorses) have eyes that can move independently of one another.
WHY is a dog's nose wet and cold?
Interestingly, in this condition, the dog can smell better. In dogs, mucus covers not only the inside, but also the outside of the sense of smell. This secret is produced by glands in the lining of the nose and serves as a sort of filter through which the animal analyzes smells.
Its moist nose allows it to detect even the slightest fluctuations in the air and their direction. It also has a keen sense of smell that allows it to not only pick up odors, but also to separate them from each other.
Interestingly, in this condition, the dog can smell better. In dogs, mucus covers not only the inside, but also the outside of the sense of smell. This secret is produced by glands in the lining of the nose and serves as a sort of filter through which the animal analyzes smells.
Its moist nose allows it to detect even the slightest fluctuations in the air and their direction. It also has a keen sense of smell that allows it to not only pick up odors, but also to separate them from each other.
WHY doesn't food burn in oil?
When frying in a pan without oil, the food only gets hot at the bottom and the top is not heated, being completely soggy. The oil gives off heat from the lower layers to the upper ones.
The boiling point of oil gives the crust on the food, but you can't get it with cooking, water interferes in the process, it adjusts to its boiling point, which is lower than that of oil.
When frying in a pan without oil, the food only gets hot at the bottom and the top is not heated, being completely soggy. The oil gives off heat from the lower layers to the upper ones.
The boiling point of oil gives the crust on the food, but you can't get it with cooking, water interferes in the process, it adjusts to its boiling point, which is lower than that of oil.