WHY do knees crunch?
Cartilage tissue lies between the two bones, reducing the friction created by walking between the bone tissue, but gradually the cartilage tissue loses its protective properties and the friction cannot be avoided.
Crunching can occur when carrying heavy loads, where cartilage tissue deforms from the increased load. Great stress on the knee comes from awkward shoes with a high heel, so at times you have to make a choice between healthy shoes with a small heel, or a spectacular one with a big rise.
Cartilage tissue lies between the two bones, reducing the friction created by walking between the bone tissue, but gradually the cartilage tissue loses its protective properties and the friction cannot be avoided.
Crunching can occur when carrying heavy loads, where cartilage tissue deforms from the increased load. Great stress on the knee comes from awkward shoes with a high heel, so at times you have to make a choice between healthy shoes with a small heel, or a spectacular one with a big rise.
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WHY are sharks afraid of dolphins?
Sharks are solitary predators. Only rarely do they gather in small groups, and even only during the mating season, then immediately parted.
Dolphins travel the ocean in close groups, strongly supporting family ties. They hunt and defend together.
If a dolphin notices a molested shark, the pack surrounds it and beats its body with a powerful beak. And the dolphin acts with a surge and deliberately marks the most vulnerable place â the gill slits, which is similar to the blow to the solar plexus in humans.
Sharks are solitary predators. Only rarely do they gather in small groups, and even only during the mating season, then immediately parted.
Dolphins travel the ocean in close groups, strongly supporting family ties. They hunt and defend together.
If a dolphin notices a molested shark, the pack surrounds it and beats its body with a powerful beak. And the dolphin acts with a surge and deliberately marks the most vulnerable place â the gill slits, which is similar to the blow to the solar plexus in humans.
WHY is there flickering in our eyes?
There are many causes of flickering in front of the eyes. Almost all of them are related to the failure of the CNS. Pathology is accompanied by poor circulation, which leads to high blood pressure and causes problems in the work of internal organs.
Most often, glare is caused by a malfunction in blood circulation and an increase in intracranial pressure. In this case, the patient observes dots of black and white in front of the eyes. Flicker can also cause the blood vessels of the visual apparatus to overflow.
There are many causes of flickering in front of the eyes. Almost all of them are related to the failure of the CNS. Pathology is accompanied by poor circulation, which leads to high blood pressure and causes problems in the work of internal organs.
Most often, glare is caused by a malfunction in blood circulation and an increase in intracranial pressure. In this case, the patient observes dots of black and white in front of the eyes. Flicker can also cause the blood vessels of the visual apparatus to overflow.
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WHY do people snore in their sleep?
All muscles relax during sleep. If the lumen of the pharynx was originally narrowed, then the relaxed walls of the upper airways, sagging, touch each other.
When breathing in and out, air passes forcefully through the narrowed and partially blocked soft tissues of the pharyngeal canal. The walls of the pharynx begin to vibrate and hit each other, causing snoring.
All muscles relax during sleep. If the lumen of the pharynx was originally narrowed, then the relaxed walls of the upper airways, sagging, touch each other.
When breathing in and out, air passes forcefully through the narrowed and partially blocked soft tissues of the pharyngeal canal. The walls of the pharynx begin to vibrate and hit each other, causing snoring.
WHY do the windows inside the car freeze?
Windshield icing is caused by the fact that the glazing is always warm when the engine is on and the air conditioning system is running. After the engine is turned off, the windows begin to cool.
Since the windshield is tilted, the cooling process is faster than the rest of the glazing. As a result, the moisture vapor that is present inside the cabin turns into an icy crust, and the windshield frosts up from the inside first.
Windshield icing is caused by the fact that the glazing is always warm when the engine is on and the air conditioning system is running. After the engine is turned off, the windows begin to cool.
Since the windshield is tilted, the cooling process is faster than the rest of the glazing. As a result, the moisture vapor that is present inside the cabin turns into an icy crust, and the windshield frosts up from the inside first.
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WHY do people talk in their sleep?
Sleep talking is a common sleep disorder and, according to some researchers, occurs in 50% of young children. Sleep talking in adults occurs in about 5% of cases.
Dreaming is more common in people who are excitable and have experienced strong impressions, both positive and negative, on the previous day.
Still dreaming and dreaming are different things. A dream may be fantastic, unreal. Dreaming, as a rule, reflects real events experienced by a person.
Sleep talking is a common sleep disorder and, according to some researchers, occurs in 50% of young children. Sleep talking in adults occurs in about 5% of cases.
Dreaming is more common in people who are excitable and have experienced strong impressions, both positive and negative, on the previous day.
Still dreaming and dreaming are different things. A dream may be fantastic, unreal. Dreaming, as a rule, reflects real events experienced by a person.
WHY does the microphone hum?
As a matter of fact, there are many reasons for such an odd phenomenon, here are the main ones.
âĒ Nearby there is a source of radio-frequency radiation. In most cases, the phonics begins if there is any electronic device next to it.
âĒ Improper setting of the microphone.
âĒ Signal level. If you amplify the sound or signal level, this can also cause unpleasant sounds.
As a matter of fact, there are many reasons for such an odd phenomenon, here are the main ones.
âĒ Nearby there is a source of radio-frequency radiation. In most cases, the phonics begins if there is any electronic device next to it.
âĒ Improper setting of the microphone.
âĒ Signal level. If you amplify the sound or signal level, this can also cause unpleasant sounds.
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WHY are there 7 days in a week?
Ancient Babylonian astrologers discovered that there were "wandering" luminaries in the sky called planets.
These bodies were believed to revolve around the Earth in this order: Moon, Mercury, Venus, Sun, Mars, Jupiter, and Saturn. Ancient Babylonian astrologers thought that each hour of the day was under the patronage of a particular planet.
For the convenience of calculations and time planning, ancient astronomers and astrologers invented the Star of the Magi, a kind of seven-pointed "calculator". In this star, the planets are arranged in a circle from the slowest, Saturn, to the fastest, the Moon.
The sequence of week days is calculated clockwise by the rays of the star.
Ancient Babylonian astrologers discovered that there were "wandering" luminaries in the sky called planets.
These bodies were believed to revolve around the Earth in this order: Moon, Mercury, Venus, Sun, Mars, Jupiter, and Saturn. Ancient Babylonian astrologers thought that each hour of the day was under the patronage of a particular planet.
For the convenience of calculations and time planning, ancient astronomers and astrologers invented the Star of the Magi, a kind of seven-pointed "calculator". In this star, the planets are arranged in a circle from the slowest, Saturn, to the fastest, the Moon.
The sequence of week days is calculated clockwise by the rays of the star.
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WHY is there left-hand traffic in England?
Left-hand traffic is thought to have originated in England, and was enshrined in law in 1756.
A special bill ordered carriages, riders and pedestrians to move across the London Bridge only on the left side. The penalty was a pound of silver.
And 20 years later, the British passed the "Road Act", which made left-hand traffic mandatory on all roads in the country.
An ancient English maritime rule played a role in the recognition of the "left" side - ships must enter the harbor on the left side and sail on the right.
Left-hand traffic is thought to have originated in England, and was enshrined in law in 1756.
A special bill ordered carriages, riders and pedestrians to move across the London Bridge only on the left side. The penalty was a pound of silver.
And 20 years later, the British passed the "Road Act", which made left-hand traffic mandatory on all roads in the country.
An ancient English maritime rule played a role in the recognition of the "left" side - ships must enter the harbor on the left side and sail on the right.
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WHY do we have nightmares?
Dreams are a way of processing disturbing impressions and emotions a person has to experience in his or her life.
When a dreamer falls asleep, the psyche layers the bad memories onto a specific context, and thus the fears associated with them are dissipated.
âī¸ Frequently, the sources of nightmares lie in work, worries about financial well-being, and major changes in one's life.
Dreams are a way of processing disturbing impressions and emotions a person has to experience in his or her life.
When a dreamer falls asleep, the psyche layers the bad memories onto a specific context, and thus the fears associated with them are dissipated.
âī¸ Frequently, the sources of nightmares lie in work, worries about financial well-being, and major changes in one's life.
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WHY does the car electrocute?
When driving, you are unconsciously moving on the seat, which is not made of natural materials.
By the end of the ride, static electricity builds up on your body. After touching the car door, you get a "shock".
To avoid the impact, you can close the car by the glass or the plastic door handle, these are so-called "dielectrics".
When driving, you are unconsciously moving on the seat, which is not made of natural materials.
By the end of the ride, static electricity builds up on your body. After touching the car door, you get a "shock".
To avoid the impact, you can close the car by the glass or the plastic door handle, these are so-called "dielectrics".
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WHY are icebergs called freshwater reservoirs?
Today, the earth's population consumes only about 0.01% of the planet's freshwater supply per year. So where is the rest? 70% of the water is preserved in Antarctic glaciers.
Using icebergs for drinking water cannot be called an idea of our time. Back in 1773, the crew of the famous James Cook collected 15 tons of drinking water from Antarctic icebergs for his ship, The Resolution.
Water consumption in the world has increased sevenfold in the 20th century alone, and there is no stopping it. Pretty soon, even developed nations will lack fresh water. It would then turn out to be economically feasible to extract water from icebergs.
Today, the earth's population consumes only about 0.01% of the planet's freshwater supply per year. So where is the rest? 70% of the water is preserved in Antarctic glaciers.
Using icebergs for drinking water cannot be called an idea of our time. Back in 1773, the crew of the famous James Cook collected 15 tons of drinking water from Antarctic icebergs for his ship, The Resolution.
Water consumption in the world has increased sevenfold in the 20th century alone, and there is no stopping it. Pretty soon, even developed nations will lack fresh water. It would then turn out to be economically feasible to extract water from icebergs.
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WHY is 666 the number of the devil?
There is speculation that the number 666 came from the name of Nero. In his era, coins were minted in the eastern part of the Roman Empire with the words in the Hebrew script of the Greek words Neron Kaisar (Emperor Nero) â "× ×¨×× ×§×Ą×¨".
If we consider not the letters themselves, but their numerical values, their sum equals 666. In favor of this, a fragment of a verse found on the Oxyrhynchus site states the devil's number is 616 (in the Greek writing "ĪΚĪ").
If we take the Nero Caesar spelling as the basis, the sum of the numerical values is reduced by 50 and equals 616, that is, Irenaeus took an erroneous spelling.
There is speculation that the number 666 came from the name of Nero. In his era, coins were minted in the eastern part of the Roman Empire with the words in the Hebrew script of the Greek words Neron Kaisar (Emperor Nero) â "× ×¨×× ×§×Ą×¨".
If we consider not the letters themselves, but their numerical values, their sum equals 666. In favor of this, a fragment of a verse found on the Oxyrhynchus site states the devil's number is 616 (in the Greek writing "ĪΚĪ").
If we take the Nero Caesar spelling as the basis, the sum of the numerical values is reduced by 50 and equals 616, that is, Irenaeus took an erroneous spelling.
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WHY are whales and dolphins thrown ashore?
Dolphins and whales get sick from time to time, too. Scientists speculate that the throwing out may be caused by parasites that settle in the animals' bodies and damage vital organs. Perhaps the cause is a mental illness in the leader â the leader has "lost his mind", and the whole pack rushed after it.
Young animals, just entering independent life, may make this fatal mistake simply due to their inexperience. Older animals may find themselves on the shore, having died of natural causes.
Unfortunately, human activity does not pass away for marine mammals either, sometimes resulting in the animal's death or being thrown ashore.
Dolphins and whales get sick from time to time, too. Scientists speculate that the throwing out may be caused by parasites that settle in the animals' bodies and damage vital organs. Perhaps the cause is a mental illness in the leader â the leader has "lost his mind", and the whole pack rushed after it.
Young animals, just entering independent life, may make this fatal mistake simply due to their inexperience. Older animals may find themselves on the shore, having died of natural causes.
Unfortunately, human activity does not pass away for marine mammals either, sometimes resulting in the animal's death or being thrown ashore.
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WHY is English an international language?
Throughout the 19th century, the British political system contributed to the spread of English throughout the globe. Colonial Britain formerly possessed India, North America, Australia, and parts of Southeast Asia and Africa.
English was relatively easy to learn, both in pronunciation and grammar. Finally, this recognition has become convenient for most.
These days, in most countries, English is taught in school as the primary foreign language, supplanting other languages.
Throughout the 19th century, the British political system contributed to the spread of English throughout the globe. Colonial Britain formerly possessed India, North America, Australia, and parts of Southeast Asia and Africa.
English was relatively easy to learn, both in pronunciation and grammar. Finally, this recognition has become convenient for most.
These days, in most countries, English is taught in school as the primary foreign language, supplanting other languages.
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WHY are there so many shapes of pasta?
In a 2010 book study, The Geometry of Pasta, Cas Hildebrand and Jacob Kenedy identified more than 1,200 names for pasta shapes.
Some derive from industrial parts: for instance, elice are screws and fusilli are spindles. According to Kenedy and Hildebrand, various shapes are better suited to different recipes.
In a 2010 book study, The Geometry of Pasta, Cas Hildebrand and Jacob Kenedy identified more than 1,200 names for pasta shapes.
Some derive from industrial parts: for instance, elice are screws and fusilli are spindles. According to Kenedy and Hildebrand, various shapes are better suited to different recipes.
WHY do cats enjoy crawling into boxes?
Retreating into hiding is a behavioral strategy of the species and essential for adjusting to changing surroundings and resisting stress.
The reason is also that it makes it easier for them to keep warm that way. According to a 2006 National Research Council study, cats are comfortable in temperatures between 30 and 36 degrees Celsius. Cardboard, among other things, provides insulating properties to keep them warm.
Retreating into hiding is a behavioral strategy of the species and essential for adjusting to changing surroundings and resisting stress.
The reason is also that it makes it easier for them to keep warm that way. According to a 2006 National Research Council study, cats are comfortable in temperatures between 30 and 36 degrees Celsius. Cardboard, among other things, provides insulating properties to keep them warm.
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WHY do sea shells sound like the ocean?
The cavity of a seashell, according to some speculations, reflects the sound of blood flowing in the human body, though this theory falls into the category of widespread myths.
In fact, the shape of the shells allows them to catch and reflect the surrounding noise, amplifying certain frequencies. Bringing one of them to your ear, you just hear echoes of soft sounds surrounding you at the moment.
The cavity of a seashell, according to some speculations, reflects the sound of blood flowing in the human body, though this theory falls into the category of widespread myths.
In fact, the shape of the shells allows them to catch and reflect the surrounding noise, amplifying certain frequencies. Bringing one of them to your ear, you just hear echoes of soft sounds surrounding you at the moment.
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WHY are traffic lights green-yellow-red?
The explanation for red is simple: it has the longest wavelength in the spectrum of visible light, so it's easier to see from a distance.
A red signal is visible from 10 kilometers away. Yellow has a shorter wavelength and may be seen from 5 kilometers away. Green, on the other hand, is only observable from 3 kilometers away.
Far more important to see the red, forbidding signal from afar than the permissive one.
The explanation for red is simple: it has the longest wavelength in the spectrum of visible light, so it's easier to see from a distance.
A red signal is visible from 10 kilometers away. Yellow has a shorter wavelength and may be seen from 5 kilometers away. Green, on the other hand, is only observable from 3 kilometers away.
Far more important to see the red, forbidding signal from afar than the permissive one.
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WHY is denim blue?
While most color formulations penetrate the fibers at high temperatures and dye the entire material through, making it coarse, the natural indigo dye used in denim only adhered to the outside of the threads.
The more often the indigo-dyed denim was washed, the more the color dulled and the looser the threads got, turning nicer to the body. People enjoyed the softness of worn jeans so they quickly gained popularity.
While most color formulations penetrate the fibers at high temperatures and dye the entire material through, making it coarse, the natural indigo dye used in denim only adhered to the outside of the threads.
The more often the indigo-dyed denim was washed, the more the color dulled and the looser the threads got, turning nicer to the body. People enjoyed the softness of worn jeans so they quickly gained popularity.
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