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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.
WHY is business class located in the front of the plane if it's safer in the back?
The probability of surviving a crash in the back of a plane is not much higher than in the front seats, only a few percent. Considering that plane crashes are rare (once per million flights), this difference can be neglected.
More important are the advantages of the front seat: quick landing and disembarkation, lower noise level and the view from the porthole, which is not obscured by the wing and the engines.
The probability of surviving a crash in the back of a plane is not much higher than in the front seats, only a few percent. Considering that plane crashes are rare (once per million flights), this difference can be neglected.
More important are the advantages of the front seat: quick landing and disembarkation, lower noise level and the view from the porthole, which is not obscured by the wing and the engines.
WHY don't mice like cheese?
Contrary to popular myth, mice are not as big a fan of cheese as they are often portrayed in cartoons and even movies.
The basic diet of mice, like other rodents, consists of grains, seeds, pieces of vegetables, fruits and sweets. In addition, many cheeses have a pungent odor that is more likely to scare away a mouse.
Contrary to popular myth, mice are not as big a fan of cheese as they are often portrayed in cartoons and even movies.
The basic diet of mice, like other rodents, consists of grains, seeds, pieces of vegetables, fruits and sweets. In addition, many cheeses have a pungent odor that is more likely to scare away a mouse.
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WHY do cats purr?🐈
The sound and vibration are created by the muscles inside the cat's larynx.
When they move, the vocal cleft expands and contracts. The air vibrates every time the cat inhales and exhales.
What do we end up with? Purring.
The sound and vibration are created by the muscles inside the cat's larynx.
When they move, the vocal cleft expands and contracts. The air vibrates every time the cat inhales and exhales.
What do we end up with? Purring.
WHY does the skin on fingers get wrinkled in water?
Our distant ancestors used to extract from water bodies not only food, but also household items. No special equipment was available, so they had to do it with their bare hands.
Skin wrinkling on palms and fingers made the task a lot easier and changing the skin on feet simplified moving over underwater rocks and other slippery surfaces.
Our distant ancestors used to extract from water bodies not only food, but also household items. No special equipment was available, so they had to do it with their bare hands.
Skin wrinkling on palms and fingers made the task a lot easier and changing the skin on feet simplified moving over underwater rocks and other slippery surfaces.
WHY is limescale in the kettle not considered harmful to humans?
If a person swallows some scale, he or she will only get an unpleasant feeling in the mouth. Limescale is mainly calcium and magnesium salts, physiologically inactive due to their insolubility.
However, these layers do not conduct heat well: settling on the heater, they increase the boiling time of water and are harmful only to the kettle itself.
If a person swallows some scale, he or she will only get an unpleasant feeling in the mouth. Limescale is mainly calcium and magnesium salts, physiologically inactive due to their insolubility.
However, these layers do not conduct heat well: settling on the heater, they increase the boiling time of water and are harmful only to the kettle itself.
WHY does the Eiffel Tower grow 15 centimeters in summer?
It's all about temperature compensators. Thanks to them, steel can expand and contract without being damaged.
When steel heats up, it begins to stretch and occupy a larger volume. It is known as thermal expansion. Conversely, a drop in temperature leads to a decrease in volume.
It's all about temperature compensators. Thanks to them, steel can expand and contract without being damaged.
When steel heats up, it begins to stretch and occupy a larger volume. It is known as thermal expansion. Conversely, a drop in temperature leads to a decrease in volume.
WHY does motion sickness occur?
It is caused by a malfunction of the vestibular apparatus, responsible for keeping us firmly on feet.
It reacts to changes in the position of the head and body in space, as well as to acceleration.
When a person's body moves and sways in a car or on a boat, the brain receives conflicting information from the different senses, which causes nausea, dizziness, and headaches.
It is caused by a malfunction of the vestibular apparatus, responsible for keeping us firmly on feet.
It reacts to changes in the position of the head and body in space, as well as to acceleration.
When a person's body moves and sways in a car or on a boat, the brain receives conflicting information from the different senses, which causes nausea, dizziness, and headaches.
WHY are there no thunderstorms or lightning in winter?
In order for a thundercloud to form, warm, moist air rises. Humidity increases as the temperature goes up.
All the particles of precipitation: rain, hail, are electrically charged. When they gather in large numbers, this charge increases.
Wet summer air has a greater conductivity of electricity, and the discharge of the potential difference is accompanied by thunder and lightning.
In order for a thundercloud to form, warm, moist air rises. Humidity increases as the temperature goes up.
All the particles of precipitation: rain, hail, are electrically charged. When they gather in large numbers, this charge increases.
Wet summer air has a greater conductivity of electricity, and the discharge of the potential difference is accompanied by thunder and lightning.
WHY is the highest-paying job in Hollywood a screenplay adaptation?
At the mention of Hollywood, most of us conjure up images of bright spotlights, gorgeous outfits, and rich celebrities.
Yet few people remember that not only actors make money on the movies, but also a tremendous number of people just doing a good job.
For example, a couple of weeks working on the adaptation of the script can make $500 thousand.
At the mention of Hollywood, most of us conjure up images of bright spotlights, gorgeous outfits, and rich celebrities.
Yet few people remember that not only actors make money on the movies, but also a tremendous number of people just doing a good job.
For example, a couple of weeks working on the adaptation of the script can make $500 thousand.
WHY does the wind blow up a fire, but not a match?
Burning wood begins with gasification (evaporation of combustibles by high temperature). In the case of a match, the flame provides the heat. However, the wind takes away the heat, and the match goes out.
A fire is kept burning by coals. The gasification of wood in them occurs in the inner layers when there is a lack of oxygen. The wind replenishes it: the smoldering of coals accelerates, the heat release grows, and the fire is ignited.
Burning wood begins with gasification (evaporation of combustibles by high temperature). In the case of a match, the flame provides the heat. However, the wind takes away the heat, and the match goes out.
A fire is kept burning by coals. The gasification of wood in them occurs in the inner layers when there is a lack of oxygen. The wind replenishes it: the smoldering of coals accelerates, the heat release grows, and the fire is ignited.
WHY do stars twinkle? 🌌
The cause of flickering is the Earth's atmosphere, through which star rays must pass before reaching the eye. Starlight in this case has to penetrate not a homogeneous medium, but gas layers of different temperature, different density, and therefore different refractivity.
Light rays undergo numerous deviations from the straight path, now concentrating, now scattering. Hence the frequent changes in the brightness of the star. And since refraction is accompanied by color scattering, along with fluctuations in brightness, changes in coloration are observed.
The cause of flickering is the Earth's atmosphere, through which star rays must pass before reaching the eye. Starlight in this case has to penetrate not a homogeneous medium, but gas layers of different temperature, different density, and therefore different refractivity.
Light rays undergo numerous deviations from the straight path, now concentrating, now scattering. Hence the frequent changes in the brightness of the star. And since refraction is accompanied by color scattering, along with fluctuations in brightness, changes in coloration are observed.
WHY is yawning contagious?
Scientists have discovered that humans react unconsciously not only to yawning, but even to the word "yawn" written on paper!
According to one theory, the contagiousness of yawning is related to the fact that humans used to live in packs, like chimpanzees, and it was crucial for them to go to sleep at the same time.
So yawning served as a signal that it was bedtime. Perceiving their neighbor's yawn as a signal to yawn and then fall asleep themselves, herd animals got used to sleeping together, keeping each other warm and safe during sleep.
Scientists have discovered that humans react unconsciously not only to yawning, but even to the word "yawn" written on paper!
According to one theory, the contagiousness of yawning is related to the fact that humans used to live in packs, like chimpanzees, and it was crucial for them to go to sleep at the same time.
So yawning served as a signal that it was bedtime. Perceiving their neighbor's yawn as a signal to yawn and then fall asleep themselves, herd animals got used to sleeping together, keeping each other warm and safe during sleep.
WHY should a tree frog not be picked up?
Under no circumstances should these frogs be handled❗
Their skin secretions are strong nerve poisons, providing them with protection from predators and explaining their bright cautionary coloration.
Yet exotic lovers raise tree frogs in terrariums. So what about their venomous nature? The fact is that in most cases it is caused by their nutrition: in the nature they eat small ants and termites and accumulate their venom. In terrariums, deprived of their "poisonous nourishment", tree frogs become practically harmless after a while
Under no circumstances should these frogs be handled❗
Their skin secretions are strong nerve poisons, providing them with protection from predators and explaining their bright cautionary coloration.
Yet exotic lovers raise tree frogs in terrariums. So what about their venomous nature? The fact is that in most cases it is caused by their nutrition: in the nature they eat small ants and termites and accumulate their venom. In terrariums, deprived of their "poisonous nourishment", tree frogs become practically harmless after a while