13 great facts no one taught us at school

Knowledge is endless, and time for school is limited. There will be things if you are not curious to find out, you will never know.

Over many years of book lights, it can be said that each of us has learned a lot of knowledge from school. However, knowledge is endless, and time for school is limited. Therefore, there will be truths if not curious to learn, you will never know.

The images below will prove this.

This is what actually happens when applying sunscreen

If you are skeptical about the effect of sunscreen, then this is what really happens.

When applying sunscreen, you have created an invisible protective film that helps limit the effects of ultraviolet rays.

The image is recorded with an ultraviolet camera - a device that records all unobservable changes to the naked eye on the skin. It is known that the effects of ultraviolet rays are terrible. Even when we do not see anything, our skin is still exposed to sun damage.

Skin looks like normal under a UV camera.

How clean our hands are after washing

We are still taught that we must wash our hands after eating. However, this very righteous teaching is applied mechanically by many people when washing very loudly, sometimes . dipping, wiping hands and going out.

And this is what actually happens when you wash your hands. To check the amount of bacteria remaining on the skin after we wash our hands - we will use Glo Germ - a cream that simulates bacteria on the skin. This cream is often used by nurses to practice hygiene.

It can be seen that if washing hands through the speakers in 3s as shown below, it is better not to wash them .

Mechanism of operation of braces

Braces can be said to be a savior for those who are unfortunately born with a " beauty " that is not very beautiful.

However, very few people can understand how this savior works.

This image will tell you about the mechanism of braces.

How do trumpets play music when blowing?

By adjusting the 3 trumpet valves, the player can change the direction of the flow of air blowing in, creating different sounds.

Is it easy to understand?

Food going into the throat will look like this

This is what happens when we swallow food. When swallowing, food passes through the esophagus, into the stomach and intestines. Next, intestinal peristalsis (the process of intestinal contraction) will move the food into the large intestine, and wait for the owner to go to the WC to exit the back gate.

This swallowing process is so intense that even if we hang upside down, we can still do it.

Every day about 100,000 flights are made, and they look like this

100,000 flights a day, the numbers are terrible.

Our Earth when compared to the largest star in the universe

Our giant earth is nothing in the universe. Compared to the Sun, we are 1.3 million times smaller. This number when compared to the largest star in the universe is Canis Major is 10 million billion times.

Our Earth is nothing in this vast universe.

How are human faces formed?

In fact, the human face does not naturally appear and grow. In the first months of pregnancy, the face will develop in separate and separate parts, then "transplant" like a puzzle.

In particular, the mouth area is "reassembled" eventually, and this is also the cause of the formation of the central line - the groove between our nose and mouth.

In fact, the human face does not naturally appear and grow.

The hatching process of dandelion flowers

Dandelion is probably too famous, especially for those who have . plowed the Doraemon series. This species of chrysanthemum is characterized by no pollination after flowering. Instead, they create asexual seeds, will follow the wind throughout the world. The result is genetically identical seedlings to parent plants.

The entire process of "birth" of dandelions is briefly described in the following figure.

This is how creeping plants survive and grow

Vines like beans . do not have a sturdy body like regular trees. Instead, they will seek to cling to hard objects to climb higher, towards the light source, thereby helping the plant grow well.

The vines like beans . do not have a sturdy body like regular trees.

No one knows how to drink from dogs

If your home has a dog, you probably won't be strange to feed him: dog eating by licking.

However, if you slow down this process, make sure you are surprised to see how the water dog is really different from what we still think.

Dogs have a very flexible tongue.

Dogs have a very flexible tongue. When drinking water, they bend their tongues . a spoon, scoop out each scoop of water into their mouths.

This is why cheetahs are the fastest animal in the world

So far, no terrestrial animal can match the African jaguar in speed - up to 100km / h.

However, just being fast is not enough. With such tremendous speed, jaguars will have to find a way to balance when the navigation is effective, because their prey will definitely not run straight.

And the jaguar has done this in an ingenious way thanks to its very flexible tail.

No terrestrial animal can match the African jaguar.

Pythagorean theorem is proved by "graphics"

In a right triangle, the square of the hypotenuse is equal to the sum of the squares of the two right-angled edges.

We all know of Pythagorean theorem (also known as Pythagoras's theorem in English) in mathematics. This is essentially a relationship in the plane geometry between the three triangle sides of a right triangle.