10 popular scientific myths

10 popular scientific myths

We have certain ideas that are based on personal experience, education, the media and the opinion of the people around us.

Many of these ideas related to science, we accept as fact, even though he has long been refuted.

Here are some of the most popular scientific myths that we all faced.

1. The Great Wall of China can be seen from space

The Great Wall is very long, but it can not be seen from space. Even China's first astronaut Yang Liwei has confirmed that he could not see with the naked eye is the creation, not to mention the myth that the Great Wall can be seen from the moon.

10 popular scientific myths

Although the Egyptian pyramids can be contemplated with the International Space Station. Best of all of the things created by man, can be seen from outer space lights.

2. Polar Star - the brightest star in

North Star is not the brightest star in the night sky, as many believe. Bright it is somewhere in the 50 th place. North Star is very easy to see, because the Earth's axis is almost directed at her. At night, the North Star is still in the same place all year round and points north.

10 popular scientific myths

The brightest star visible after the sun is Sirius in the constellation Canis Major. Sirius apparent magnitude is -1, 47 (the lower the value, the brighter the star).

3. It is necessary to run in zigzags to avoid a crocodile attack

One of the oldest survival tips is: if you want to escape from a crocodile, you need to move in zigzags, because it can not turn quickly.

In fact, crocodiles almost never hunt on land and prefer to attack from the water.

10 popular scientific myths

The maximum speed on land they reach about 16 kilometers per hour, which makes it possible to outrun a crocodile as moving zigzag and in a straight line.

4 shots in the tank, you can blow up a car

This effect can be seen only in movies and video games. In fact, the bullet or zasyadet in the tank, or pass through it. In the TV show "Mythbusters" shots in the tank did not lead to an explosion, or even to a fire.

10 popular scientific myths

However, if the applied tracers with a sufficiently large distance, then the heat from friction with air can cause explosion. However, not so easy to blow up a car, as it is shown in Hollywood films.

5. Red angry bulls

Spanish bullfighter began to use a piece of bright red cloth or muleta back in the 1700s. Since then, I spread the myth that bulls annoying red.

10 popular scientific myths

In fact, the bulls do not care what color to attack, and they have no color preference. They attack the object, which is the most moving.

6. Lightning never strikes the same place twice

Lightning usually strikes the same place twice. Moreover, this phenomenon is very common. For example, the famous skyscraper Epayr State Building is struck by lightning about 100 times a year.

10 popular scientific myths

Lightning is most fond of the tall buildings and trees, but large fields, lightning often strikes several times in the highest object before you move to another towering goal.

7. Glass solid

10 popular scientific myths

Glass - is an amorphous solid, which behaves like a liquid with a very high viscosity. This means that it flows very slowly, explaining why stained glass is thicker at the bottom.

8. In space there is no gravity

In fact, in space so much gravity that she makes the stars revolve around the center of the galaxy, the Earth around the sun, and satellites around the Earth. The reason why the astronauts seem weightless in space, is that they revolve around the Earth.

10 popular scientific myths

They fall in the direction of our planet, but are moving towards. At the height of the orbit about 400 kilometers above the Earth, gravity is reduced by only 10 percent.

9. There is a dark side of the Moon

The sun at some point covers every part of the Moon. However, there is a side of the moon, which is never seen from the earth. This is caused by tidal capture, leading to the fact that the moon revolves around its axis is the same period that revolves around the Earth.

10 popular scientific myths

We always see only one side of the moon, but the other side is not dark. When we see a crescent moon, for the most part of the sun illuminates the side that we do not see.

10. Nerve cells do not regenerate

For a long time, scientists believed that the difficult work of the brain can be disrupted due to the growth of new cells. However, in 1998, Swedish scientists found that brain cells can regenerate. Centers of learning and memory in the brain can create new cells.

10 popular scientific myths

In addition, US scientists have discovered a process that allows you to create a copy of the embryonic stem cells that can be transformed into brain cells.