Scientific truth about misconceptions everyone believes

Nails still grow long after death, vaccination against the flu will be immediately affected by influenza . are somewhat misconceptions, but we still believe it is true.

In life, there are scientific notions that we always think are true but not really. Learn about the scientific misunderstandings below.

1. Milk helps you grow tall and strong

We often hear parents, teachers and doctors say that if you want to be strong and tall, take care of milk. But is this really true?

Some scientists and nutrition experts have argued: Whether every child over 8 years of age drinks 3 glasses of milk a day (about 0.7 liters of milk) or eats yogurt, cheese . really do healthy baby, stronger bones?

However, researchers at Harvard University and Cornell note that there is no convincing evidence that milk helps strengthen bones, although it provides calcium to help bones grow.

It is said that Americans drink milk from a young age to an old age, but every year there are still several million people suffering from osteoporosis. Not only that, many people are afraid that milk and dairy products also increase the risk of obesity, digestive diseases .

2. Nails still grow after we die

There is a rumor that many people still believe, the biological functions of the human body still occur for days, even months after death. Therefore, our nails can continue to grow.

This is completely wrong. After human death, glucose in the body - the part that affects new cell growth is no longer produced. This means that nails and hair - two parts produced by glucose - will stop growing immediately.

But because after death, the body loses water and dries. As a result, the skin shrinks, revealing the nail and hair before being hidden under the skin. Therefore, when looking, many people think they grow longer.

3. Summer is hotter because we are closer to the Sun.

Many people often assume that the summer is hot, stuffy because we are closer to the Sun than the winter. However, this is completely inaccurate.

The reason is because the Earth is about 149.6 million kilometers away from the Sun, so any part of the Hemisphere approaching the Sun will cause the Earth's temperature to change there.

The angle of sunlight shining on the positions on Earth is the factor that creates the seasons, the vertical angle will produce the highest temperature.

4. Getting a flu shot will make you mildly sick

According to Dr. William Schaffner, a preventive medicine specialist at New York University, many people are concerned that after a few days of getting vaccinated against the flu, they show signs of the flu. This makes many people believe that vaccines are the cause of influenza.

You need to know that vaccines, when injected into the body, are weakened viruses that help our immune system get used to, creating resistance to these viruses.

However, it is possible for you to get the flu after getting a flu vaccine, but it is not caused by the viruses in the vaccine. In fact, after the vaccination, the body's immune system may be weakened by the fight against the new virus.

Therefore, if the body is exposed to the source of infection before vaccination, the risk of developing the disease is very high. This makes many people psychologically confused about getting vaccinated against the flu.

5. The Big Bang theory explains where the universe comes from

The Big Bang theory is a prominent cosmological model, depicting the early stage of cosmic formation. According to this theory, the Big Bang occurred approximately 13.798 ± 0.037 billion years ago. After this period, the universe is in a very hot and dense state, beginning to expand rapidly.

This theory makes many people mistake it to be the origin of the universe. However, the truth is, the scientific community only accepts this theory as an explanation of the expansion of the universe, it was not born from the beginning. So far, scientists have not been able to explain where the universe comes from.

6. Sugar makes children more active

Parents are often afraid to witness an 8-year-old brat rushing to eat cakes, ice cream and candy at a birthday party. It is not a concern about children's caries or stomach disease, but a hyperactivity explosion.

However, no studies have shown a true link between sugar and hyperactivity. In fact, a 1994 study found that mothers thought their children were hyperactive because they drank sugary drinks.

However, according to observations, mothers who know their children drink water and eat sugary foods often scold their children more than the rest of the mothers.

7. Taking vitamins helps treat colds

It is suggested that taking a large amount of vitamin C will help us increase resistance and prevent colds - a disease that is easy to see in people.

But the truth is that you should only use it just enough to allow your body to absorb enough vitamins, and there is no conclusion that vitamins can help prevent colds.

Not only that, many people believe, it is cold to stay outside in the cold. In fact, staying home too much is the main problem. In the winter, we tend to stay indoors more so it's easier to spread the flu to those around us.

And you can easily catch a sudden cold when you step quickly from a warm environment to a cold space.

8. Lightning does not hit twice in one place

We know that lightning or lightning is the phenomenon of atmospheric discharge between clouds and soil between other charged clouds, sometimes appearing in volcanic eruptions, sand dust.

When discharging in a lightning atmosphere, it can travel at a speed of 36,000 km / h, with a temperature of about 30,000 degrees C. The reason for forming lightning is still a controversial topic of many scientists. Many experts believe that wind, humidity, friction, atmospheric pressure . are elements that constitute lightning.

In addition, ice crystals in clouds can be an important factor in lightning formation because it can create an environment of opposite polarity in clouds leading to lightning formation. .

More specifically, lightning can hit 2 times in one place. In 2003, experts noted that lightning could attack any location and did not exclude previously hit points.