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Magical mental health effects of enchanted youth drinks

A delicious green drink can be a golden key to helping treat anxiety, a fairly common and complex mental health problem.

Scientists from Kumamoto University (Japan) have proven that their country’s famous matcha tea powder not only makes delicious drinks but also good for health. Experiments in mice show that it directly affects two important neurochemicals and is a powerful anti-anxiety agent.

Matcha is the ingredient that has made many popular drinks over time – (artwork from the internet).

According to Dr. Yuki Kurauchi, MD, lead author of the study, in animal experiments, matcha has shown a direct effect on the two dopaminergic and serotonergic systems in the brain, helping them function. stronger. These are the two systems that help produce dopamine and serotonin, two important neurotransmitters.

Dopamine, dubbed the “happy hormone”, increases dopamine to help us feel happy, satisfied, motivated in all life activities, boosting the brain … Meanwhile, abundant serotonin helps you increase ability to regulate mood and appetite, sleep better, increase awareness … Deficiency of these two hormones can lead to low mood, ease anxiety and even anxiety disorders, a fairly complex syndrome journal in psychiatry.

Matcha is a famous Japanese green tea powder, the leaves of green tea (tea) are finely ground. Green tea plants used to make matcha must be grown under 90% shade and cared for in a special way by indigenous people. Matcha is often used to make a variety of drinks and is also a material for coloring, flavoring for food.

Dr. Kurachi added that in order to make a more positive assertion, an epidemiological study on humans is needed. However, the evidence they have collected is sufficient to show that matcha brings certain benefits to human health.

The research has just been published in the scientific journal Journal of Functional Foods.

Warming water, California’s offshore sea “white shark park”

Scientists suspect warming temperatures may explain the presence of white sharks in Monterey Bay, California.

A large group of white sharks have settled along the central coast of California, captivating seafarers, residents, local media and scientists.

Marine biologists are investigating why sharks – the world’s largest predatory fish – ventured to California’s Monterey Bay.

Adult white sharks usually reside in warm waters in southern California, near the US-Mexico border. But these fish have been wandering northward over the past few years, leading to their frequent appearance in Monterey Bay since 2014.

Scientists suspect warming oceans may play a role in the shark’s surprising shifts.

“White sharks are heat-resistant – they have a warmer internal temperature, making them more like mammals than fish. Especially when born, they must be in the golden temperature range not too hot, not too cold, “Sal Jorgensen, a senior researcher on the Pacific white shark at Monterey Bay Aquarium, told Guardian.

Together with researchers at local universities, Jorgensen is tagging and tracking white sharks, to better understand how these ancient, large sea predators deal with climate change. .

He said that warming ocean temperatures – due to a climate crisis – may have drawn sharks to areas previously too cold to live comfortably.

A group of young sharks migrating to Monterey Bay have caused some warnings. Local media sent reporters on helicopters to record their images. Travel boat companies started offering shark watching trips.

Experts say the group causes little danger to humans. Adult white sharks, which can reach up to 6 meters long, are the pinnacle of prey to hunt marine mammals such as sea lions and seals. Juveniles are smaller than half, eating only fish and small squid.

Many of the protections enacted in the mid-1990s in California have helped the local white shark population thrive, although scientists are still studying the exact size and trend of the individual.

A 2011 study estimated that 219 adult white sharks live off the coast of Central California. This species is classified as a vulnerable group on the IUCN International Red List (IUCN).

The North Pole is burning intensely, and the fire is so large it is visible from outer space

The Arctic, though warming in recent years, is nonetheless one of the coldest places on the planet with ice all around. The thing is, when we went through the record-breaking June, then … oh my god, believe it, the North Pole is literally catching fire.

In areas from Greenland through Siberia and Alaska, flames are spreading, pushing giant smoke columns across the upper part of the Northern Hemisphere, creating a stuffy atmosphere.

It is known that the story took place in early June, when more than 100 fires broke out and burned the bushes around the Arctic belt. In Russia, 11 of the 49 areas are currently in fire. With an unusually hot, dry summer, even the icy Greenland is currently burning for days. And you know what, that fire could even be seen from space, through satellite systems.

In fact, the fact that the Arctic has a fire is not too rare, because it has a pretty rich bush system. In addition, there are many frozen waters here where methane is trapped inside, so if handled well, it can create fiery ice.

However, in recent years, things are getting worse due to the consequences of climate change. Currently, the number of fires with extreme intensity is very large.

According to Thomas Smith, an environmental geologist from the London School of Economics, this year’s intensity is unprecedented for a total of 16 years of satellite data collection. Fires are gradually reaching carbon stocks, and can make the climate warmer.

“This is one of the largest fires on the planet, even some places larger than 100,000ha” – Smith said.

“The amount of CO2 emitted from the Arctic belt in June 2019 is greater than what is emitted from ALL fires in the same period from 2010-2018.”

Even unburnt areas are suffering. As noted by NASA’s Earth Observatory, there is now a huge pillar of smoke covering Russia, causing the air quality in major cities to drop dramatically.

Experts estimate that without preventive action, the consequences of these fires will be devastating, especially for the current climate change.

Discovered the “path of love” where 5 human species mate

A road from Africa across Eurasia has revealed evidence of the extraordinary love between us modern humans and at least 4 ancient species of extinction.

New research by the Australian Ancient DNA Center at the University of Adelaide (Australia) redraws the map of a historical path that our Homo sapiens ancestors traveled 50,000-55,000 years ago, leaving Africa to other promising lands on the Eurasian continent. More specifically, that path marks countless love species of theirs and other homin belonging to the extinct species of his genus.According to the main author – Dr. João Teixeira, a group of adults from Central – North Central Africa has left their homeland to the north. In present-day Egypt, this group splits into two branches, one heading toward present-day Algeria, one moving to the Middle East and meeting Neaderthals in present-day Saudi Arabia – Iraq. Many heterosexual marriages happened. The Neaderthals became extinct shortly after (about 30,000-50,000 years ago) but they managed to leave their lineage in the genome of ancient Homo sapiens.

After that, the ancestors, with many individuals having crossed Neanderthals, split into two groups, one going towards Europe and staying, one moving to Southeast Asia. On the way, in today’s Iran-Pakistan region, our ancestors met a mysterious extinct species, temporarily called “Hominin extinct 1”, mixed with blood again.

This group continues on to what is probably near the border of today’s Myanmar Myanmar, branching again. The group heads north to meet the extinct Denisovans, which reside in present-day Tibet, and fall in love again.

The group turns south across Southeast Asia – which may have once remained a strip of land – to the area of Indonesia. They are called Australo – Papuan, ancestors of present-day Indonesians and Australians. The group met again and fell in love with another group of Denisovans.

Their descendants continue to split. A group with similar genetic characteristics to Filipinos now moves to the Philippines and mate with the Denisovans again; while the group headed towards Australia and on their way across the area around the island of Flores in present-day Indonesia, they mingled with the unidentified fourth extinct humanity, known as “extinct Hominin 2”.

The exciting research has just been published in the journal PNAS.

The truth to know about sunscreen

70% of seafarers always have their lips “naked”, while this is an area prone to melanoma. Remember to use sunscreen to protect your lips.

>>> Interesting secrets about sunscreen

What is SPF?
SPF is an indicator of the ability to protect the skin from UVB rays. To calculate the SPF, manufacturers must test the skin with sunscreen and without sunscreen, see how long the skin is red.

Note, SPF and sunscreen protection do not increase linearly with each other. For example, SPF 30 does not provide double the protection of SPF 15. The difference is that SPF 15 protects the skin from 93% UVB and the SPF 30 protects the skin from 97% radiation.

Applying sunscreen is a therapy to keep the skin young and healthy. It can become your daily routine. If you are using sunscreen, read carefully what you need to know below:

There is a difference between sunblock and suncreen
These terms are often used interchangeably, but in reality they have differences:

Sunblock is a product line that prevents UV rays from being absorbed into the skin by zinc oxide or titanium oxide. These substances are not absorbed into the skin because they are only on the surface of the skin. Therefore, to fully utilize the sunblock, you must apply a layer evenly, without leaving a place. Pros: Durable grip, does not penetrate the skin so it heals for the skin. However, because you have to apply a thick layer, the face skin is easily greasy and shiny.

Suncreen is a product line with UV absorbing substances to neutralize its harmful effects. Pros: Does not create a white film on the skin should look more natural than sunblock. However, their performance is not stable, so you must regularly add cream after 3-4 hours. In addition, the product may cause an allergic reaction to sensitive skin.

The choice of cream is depending on the preferences of each person. When using, you should note:

Use sunblock, you should apply lotion first and then sunscreen (because sunblock is on the surface of the skin, if applied first, it will prevent the cream from promoting its use).
Use Sunscreen, you should apply sunscreen first then lotion (because sunscreen needs to soak into the skin to work).
Sunblock is often a better choice for sensitive and irritated skin from chemicals in suncreen.
Find out carefully what is on the product label you decide to choose between sunblock and suncreen.

Use both skin creams simultaneously
You often think that just using sunscreen is okay, actually not enough. Doctors recommend adding an equal amount of lotion to the sun-exposed areas on your body and face (approximately 2 tablespoons).

Usually use
If you spend most of your time outdoors, you need a plan to use sunscreen all day

The sunscreen effect of the cream lasts for about 2 hours, so it is best to reapply it every one and a half to 2 hours. Remember, not a high SPF cream will work longer, this time period applies to all sunscreens.

Do not think that sunscreen is waterproof
Conventional sunscreens do not have a waterproof function, so manufacturers are not allowed to write on their products with this feature. However, they can use the word “water resistant” to promote the exaggerated product.

Please check the labels carefully. If you use water-resistant sunscreens, you may need to reapply them after about 40 minutes.

Don’t forget to protect your lips
The lips are right in the middle of the face and they are exposed to the sun just like the rest of your body. So they also need to be protected.

According to a survey, up to 70% of seafarers always let their lips “naked”, while this is an area prone to malignant tumors. So make sure to use lip balm and sunscreen to protect your lips.

The safety of sprays
Sunscreen spray is relatively new and convenient to use. However, many people are concerned about its safety. Therefore, you should carefully study the use as well as contraindications on the package to have an appropriate choice.

Sunburn to what extent can skin cancer
The degree of sunburn depends on genetic factors and environmental factors exposed. However, the darker the skin, the less sunburn and the lower the risk of skin cancer. In contrast, fair-skinned white people are more likely to get skin cancer.

Sunscreen and impact on the ecosystem
Between 2015 and 2018, one in five coral reefs in the world died, partly because of sunscreen. In May 2018, Hawaiian lawmakers enacted a bill to ban sunscreens containing oxybenzone and octinoxate that are harmful to coral reefs on the island.

Ingredients in sunscreen are safe for health
There is plenty of evidence to show that sunscreens are safe, but science has so far not fully understood the health effects of using sunscreens for a long time.

Some studies show that para-aminobenzoic (PABA) and benzophenone sunscreens can irritate certain skin types, leading to rashes and rashes. The chemicals in sunscreens such as avobenzone, oxybenzone, octocrylene, and ecamsule are likely to enter the bloodstream but the consequences are unclear.

When to remove old sunscreen
Shelf life of sunscreen is usually three years under normal room temperature conditions. If placed in an environment that is too hot or too cold, the quality of the product will be affected, thereby disabling their function.

Sunscreen can be used on other areas of the skin
The American Academy of Dermatology recommends that the community use sunscreen on areas where it is exposed to the sun directly before going out for 15 minutes. For areas where clothing is supported, simply apply an appropriate amount to the skin. For areas of direct sunlight, reapply sunscreen every two hours.

The illusion of fake souls that make people meet ghosts often?

One day you look in a mirror and see someone occupying your body. Is there a fake or you have Capgras syndrome?

In the famous horror movie “Us”, director Peele built the grisly situation that the Wilson family encountered. That is being replaced by his copy, killed. That only happens in movies? In fact, since 1923, scientists have found a disease that makes people “see” their counterfeiters.

Not recognizing loved ones because they think there are fake people
In 2011, the Psychiatric Times reported that Mary (40), mentally disordered, could not continue to care for her daughter. Mary’s daughter, Sarah (age 9), according to her description has been detained by the Child Protection Center. The girl living with Mary was essentially the one pretending to be her ill-fated daughter.

The thought made Mary often scream when Sarah approached, refusing to pick her up. Despite the reassurances and affirmations from the family, Mary screamed in agony: “This is not my daughter, please return her to me.”

According to the initial evaluation of the treating doctors, Mary has delusional syndrome, also known as Capgras syndrome. This is not a rare disease but is often misdiagnosed into other mental illnesses.

Before Mary, since 1923 scientist Joseph Capgras and his partner Reboul-Lachaux have recorded similar cases. A woman in Paris has been described as bizarre as saying that her husband and children have been kidnapped, the relatives living in the house are actually fake.

This woman repeatedly asserted that she encountered a ghost and tried to prove that the man was not her husband. She resolutely divorced her “ghost” husband and took the time to look for real relatives.

In 1991, this expression was also seen with a 74-year-old woman when she claimed the man sleeping in the bed every night was “a fake”. Strangely, except her husband, this woman recognized all the other members.

In some records, many patients do not even recognize themselves when looking in the mirror. In 2015, a French man was “horrified” when he saw the stranger exactly like his appearance in the mirror.

Decipher the mysterious syndrome
According to NCBI, Capgras delusion is a mental disorder that causes patients to live in the minds of their relatives being duped by a fake with the same appearance and gestures identical to the “original”. The syndrome is named after Joseph Capgras – the first person to discover and study it.

People with Capgras are often surrounded by a layer of delusional beliefs related to identifying the identity and characteristics of their relatives, sometimes even themselves. Capgras is often misdiagnosed as schizophrenia, temporary memory loss or brain injury.

Capgras syndrome is most often associated with Alzheimer’s disease or dementia. Both of these illnesses affect memory and can change the actual feeling of people suffering from the world around them. Brain injury can also be one of the causes of the disease.

Treatment
According to Healthline, until now, the treatment of Capgras is still a mystery. New studies show just how to reduce symptoms.

Treatments may include:

Use cholinesterase inhibitors, which help enhance neurotransmitters associated with memory and judgment, for dementia and Alzheimer’s disease.
Using antipsychotics and treatment for people with schizophrenia.
Surgery when the patient has brain damage or head injury.
However, the most effective treatment is to create a positive environment, create a sense of security for the patient.

Strange mental illnesses that medical science has not explained
The weirdest mental disorders in medicine

Thien Cung 2 space station re-enters the atmosphere, “controlled destruction”

China’s Thien Cung 2 space station entered Earth’s atmosphere successfully on July 18 under controlled conditions, it was destroyed and debris fell to the South Pacific.

The space station has completed the final test phase of Beijing’s ambitious space-conquering program.

The space station or Thien Cung 2 was launched into orbit in 2016 and returned to Earth’s atmosphere at about 21h06 (local time) in control, according to the China Manned Space Engineering Office. (CMSA).

Some fragments of the space station have fallen into “predefined safe waters” in the South Pacific.

Xinhua says the station has been in orbit for more than 1,000 days, much longer than its two-year “life expectancy”.

Zhou Jianping, the chief designer of China’s manned space program, told Xinhua that entering controlled atmosphere of the Earth marks all the missions planned by Thien Cung 2. was successful.

Earlier, Thien Cung 1 station was launched into orbit in September 2011. However, it was almost completely burnt during the process of entering the Earth’s atmosphere and crashed in the South Pacific region in April 2018.

Now Beijing’s resources will be concentrated on the space station under construction. The station will become the only space station in orbit, after ISS (International Space Station) retires in 2024, although it will be much smaller than ISS. ISS weighs 400 tons and is as big as a football field.

In 2003, China became the third country in the world to send people to space after the Soviet Union and the United States. Beijing sees this as a turning point marking the stature of a global superpower.

Two Vietnamese are in the top 100 typical Asian scientists in 2019

Two Vietnamese scientists were voted for their outstanding achievements in the field of biomedical research.

List of 100 typical scientists of Asia just published by Asian Scientist Science Magazine named two Vietnamese scientists including Prof. Nguyen Thanh Liem (Vinmec Stem Cell Research and Gene Technology Institute) and TS. Nguyen Thi Hiep (International University, Vietnam National University, HCMC). Persons recognized on this list must have national or international awards in 2018 for important scientific research or leadership in academia or industry.

Prof. Nguyen Thanh Liem is credited with many achievements, being the first stem cell surgeon to treat cerebral palsy and autism in Vietnam; Direct surgery of 5 conjoined twins is more difficult than 15 years ago. He also has nearly 100 scientific works in international journals in the US and Europe. The most recent is the research published on Vietnamese gene sequencing. Prof. Nguyen Thanh Liem has been awarded the Asian Nikkei Prize for Science and Technology.

The second scientist is enrolled as Dr. Nguyen Thi Hiep, who is currently the Head of the Biomedical Engineering Department at International University. Dr. Hiep was awarded L’Oréal – UNESCO award for outstanding female scientists under 40 in 2018 for researching the glue that can be used to treat different types of wounds, kill bacteria and reduce regeneration time. tissue. She has also been awarded the first ASEAN-US – 2017 Award for Solutions to Reduce Pressure on Rapid Urbanization – Public Health, ASEAN-2017.

This is the fourth year Asian Scientist magazine has voted and published a list of leading scientists in the region with research, innovation and significant contributions in many fields. So far, Vietnam has had 7 scientists in the list of votes of Asian Scientist.

What is digestion only? Some targets self-consumed in surgery? How long does it take to spend?

Self-draining threads are the only commonly used type of medicine in suturing wounds. There are many types of indigestion, each of which will fit a different type of wound. Today, let us learn about some types of self-consumption targets and how much time will be spent on self-discharge !!!

What is digestion only?

Self-draining threads are mainly made from organic synthetic fibers. After a period of using this thread to suture the mouth of the wound, they will dissolve by performing hydrolysis. There are many types of indigestion that are used during surgery, depending on the characteristics and location of the wounds.

Sew the wound with self-draining thread.

Wounds on the surface of the skin usually use the normal thread to sew and then it will be cut later. This thread trimming can be carried out at home or to health facilities to ensure safety. With wounds in internal organs, cutting is not possible. At this time, people will resort to self-consumption. Wounds that heal long, need a long time for the mouth to heal properly, they will use the type of self-target that has long hydrolysis time.

In surgery, self-consumption is very convenient, because it will reduce the pain that patients suffer.

Some types of digestion time and their respective digestion time
In surgery, a number of commonly used targets are polyglactin 910, polydioxanone, polyglecaprone, simple catgut, chromite catgut, etc. Let’s take a closer look at these threads!

Surgical polyglactin 910 only

Polyglactin 910 will dissolve by hydrolysis.

This thread is synthesized from glycotic, lactic acid, copolymer acid, outside is covered with a layer of polyglactin 370 and calcium stearate. When performing oral sutures of wounds, polyglactin 910 will be softened when penetrating the tissues and limiting tissue irritation, keeping the mouth sutures quite well.

Polyglactin 910 will dissolve by hydrolysis. It takes up to 90 days for this type of thread to be fully absorbed and dissolved by the body.

Self-consumed polydioxanone only

Polydioxanone is synthesized from polimer. This component only surgery has a higher stage, easier to control in the mouth of the wound. Polydioxanone is indicated for tissue-related wounds and tissues that require long term support. Heart-related surgeries, micro-neurosurgery should never use polydioxanone.

Compared to the toughness of this thread, it is so high that it takes up to 90 days for polydioxanone to completely dissolve into the body.

Self-target polyglecaprone only

The ingredients that make up this thread are glycolic acid and caprolactone. Use polyglecaprone for suturing of soft tissues, short support time as well as rapid recovery. This type of thread is easy to use, when performing oral sutures wounds will not cause pain to the patient, the risk of infection is very low.

Like other types of surgery, polyglecaprone will also be self-absorbed, dissolve into the body through hydrolysis. Usually this process lasts for 20 days.

Self-target only simple catgut

Simple catgut is derived from all natural sources when it is made from sheep’s mucus and serum in cow intestines. Their composition contains 97 to 98% of collagen that can be absorbed, twisted or single-stranded, making them extremely durable.

This type of surgery is absorbed very quickly by the body through the enzyme reaction process. Typically, the length of the thread lasts for about 10 days and the thread will completely dissolve within 70 days afterwards. Patients with cancer or malnutrition should consider using this thread because the process of enzyme reactions takes place faster than usual.

Only catgut chromite surgery

This thread is synthesized from the mucus of sheep’s intestines and the serum in cow’s intestines.

Like simple catgut, chromite catgut is also synthesized from the mucus of sheep’s intestines and the serum found in cow intestines. Collagen content accounts for 97 to 98%. However, the difference between these two types is that chromite catgut is treated with chromic salt. This salt works to slow down the reaction of enzymatic decomposition, making the ability to hold stitches better. Types that are only naturally derived will usually increase the ability of tissue to react more than types that are only naturally derived. However, this type of thread is also considered to be very safe in handling surgical incisions.

Chromite catgut is suitable for incisions with short recovery time. Self-sufficiency time is within 14 to 21 days.

Few people know that Thomas Edison was the inventor of the process of building a precast concrete house

Of all inventions of the inventor Thomas Alva Edison, which is known all over the world, there is an invention that, although not very successful, has an important meaning to the construction industry today, which is precast concrete.

By the end of the 19th century, Edison, like many businessmen and builders at the time, greatly appreciated the performance of cement. Edison believes that cement or precast concrete can be the answer to all housing problems. So he decided to improve and turn cement into an even better material.

Thomas Edison demonstrates a model of a concrete house.

Edison coming to the cement business was a coincidence. For 10 years, Edison failed to crush iron ore and sold all the iron ore waste to cement factories. At the time, Edison tried to maintain the factory’s business using stock from General Electric.

This approach, although quite successful, cannot last long. Edison realized that he was wasting effort in vain. In the end, Edison decided to switch to cement production instead of selling iron ore waste to competitors.

In 1899, Edison founded the Edison Portland Cement Company and built a large-scale factory in western New Jersey, including a huge and almost largest rotary kiln in the world at the time. Within 10 years, Edison and his company became the 5th largest cement manufacturer in the world. Edion’s research team is constantly improving the cement manufacturing process better and Edison holds the patent for those innovations. So far, Edison holds 49 patents related to the cement production process.

His dream is to one day produce a series of cheap concrete houses. He patented a process of building a house with prefabricated concrete blocks instead of pouring one floor at a time. Accordingly, concrete will be poured into large wooden molds for forming. Even outside of walls and floors, he wanted every structure and interior in the house like bathrooms, toilets, sinks, cabinets, beds and even refrigerators and pianos to be made of concrete.

Edison’s patent states: “The goal of my patent is how to build a cement mixed building with a single concrete block molding operation. All parts of It consists of facades, roofs, partitions, bathtubs, floors, … can be made from an inseparable concrete block.

This invention can be applied to any type of building but I plan to use it for housing construction, including stairs, decorative ceilings, furniture, etc. formed by a precast concrete block and attached to the main house. Such a house is certainly very hard to demolish. “

Although Edison’s ambition is considered by many to be crazy. However, to prove to the world that such ambition was possible, he tried to shed two experimental buildings at the home of a gardener and a garage in Glenmont mansion in New Jersey in 1910.

The house is being built with prefabricated concrete blocks.

He even announced that he would donate all of this patent information to architects and construction contractors, regardless of profit.

Edison’s statement then caught the attention of philanthropist Henry Phipps. He also suggested using concrete houses to solve housing problems in the city. New York Phipps even announced it would build a city for working-class families using Edison’s concrete casting technique. However, when building, Edison was unable to provide enough volume as planned.

It was then that Edison realized the unreality of his dream. One of the main technical problems of such one-off houses is the complexity of the molds. Each house needs more than two thousand precast concrete molds and they must be accurately and carefully disassembled to build the next house.

The process is actually quite cumbersome and complicated. Another problem is how to pour concrete the most smoothly. The challenge for the engineers was to create a mixture that was liquid enough to flow into every corner of the mold. But it also needs to be thick enough to condense the aggregate in the cement mixture and not let them settle to the bottom due to gravity.

Despite numerous problems, Edison managed to build a few houses in Union and Montclair, New Jersey, and they still exist today.

Why are the letters on the computer keyboard not in alphabetical order?

About 150 years ago, all papers and letters were handwritten with a pen and ink, and about one or two words had to be put in the ink bottle, making writing very slow and easy to get dirty. .

Then a typewriter was born. The first typewriter was made of metal so it was heavy and had a mechanism that worked a bit like a piano, meaning that when you pressed a key, a lever bounced, causing the hammer at the top to type into the string. and make sounds.

Keyboard.

Similarly, at the tip of the typewriter keys are hammers that print the letters. When you press the key with the letter A, the hammer’s hammer heads on the paper and prints the letter A, and the paper inches a little to the left so that the second hammer will type in the space immediately to the right of the A. so you can type a whole word, and if you type a lot, you will get the whole book.

The first typewriter had the same alphabetical order as in the alphabet. The problem is that if you type quickly, two keys side by side are very susceptible, especially if those keys are next to each other. Rearranging the keys reduces the chance that the keys will get stuck.

The American inventor named Christopher Sholes was the most successful when it came to reducing typewriter keys. He tried many arrangements and the best one was similar to the keyboard in the QWERTY order we use today.

Mr. Sholes sold the invention to Remington Company in the US. In the 1870s, the Remington Company produced and sold the first typewriters for commercial purposes. These machines have a QWERTY keyboard.

About 100 years later, so many people typed in the text that it became a professional profession around the world. They use the QWERTY keyboard so familiar that people can hardly change the habit of using the keyboard in a different arrangement.

Besides the QWERTY keyboard, a number of other keyboards were invented and considered easier to learn than the QWERTY keyboard. However, none of them is strong enough to defeat QWERTY.

QWERTY was invented to use the English alphabet. Other languages ​​use other keyboards, such as AZERTY for French, QWERTZ for German, or QZERTY for Italian. You can also see a keyboard used for Indian, Thai, Japanese, Korean or Chinese.