Interesting photo series to help you understand how the world around us works?

These interesting images below will help you understand more about how the world around you works every day.

There are simple things that appear before our eyes every day, but perhaps until now you know how they work.

1. Berlin (Germany) subway map compared to reality. The actual routes are generalized and simplified into colorful straight lines on the map. This method is called topology, first appeared in England in the early 20th century, then spread throughout Europe and America.

2. If you wonder: Can you ever draw 3 perpendicular lines? The answer is yes, that is when you draw on a spherical object.

3. How a sewing machine works. The sewing machine process creates more elaborate stitches than we think.

4. How the grenade is detonated.

5. Close-up of the process to create a tattoo.

6. Press the small button on the back of the fan once and it will make the fan rotate in all directions. It's really magical and here's how it works.

7. To be able to control a canary puppet is a complicated process with many movements.

8. A drill rotates in a circle to create a square hole! It sounds absurd, but when you look at the image below, you will understand why it can happen.

9. Pretzels, when made by machine, are extremely fast and even. Pretzels, originally called Pretzel/Brezel, are especially popular in Germany and Austria. They are spiral-shaped and made from wheat flour.

10. The process of making a paper clip. A metal wire sticks out, the machine will "beat" it continuously to turn it into a cute paper clip.

11. Fast-forwarding the process of braces makes many people "shudder" and "feel toothache".

12. So this is how ice cream cones are "twisted".

13. Ants move their legs very skillfully, don't they?

14. Wifi signal coverage in your house like this. Surely you know where the modem is located?

15. It's not like you'll have a dozen divers come down and install the undersea cable for you, a specialized ship will do it.

16. This is how ships cross the Panama Canal.

17. How clothes hangers are made

18. Many people think that owls have short legs. But in fact, their legs make up 60% of their body.

19. How were the nails in the middle of the river created? Here is the answer for you.

20. If you are curious about the "interior" of a film camera, take a look at this picture.

21. Depending on different geographical regions and soils, people can grow carrots that are white, orange, and even deep purple, almost black. Whether purple or white, the inside is still orange.

22. With a height of 8848 meters, Mount Everest is known as the roof of the world. However, it is not as poetic as you think. There is only trash and dead bodies when conquering Mount Everest.

23. Do you think penguins have knees? If the answer is no, then you are wrong. In fact, penguins have knees like many other animals.

24. The end of the Great Wall ends at the Bohai Sea.

25. Life is full of tricks. So, when buying fast food, be careful because size L is only equal to size M.

26. Image of a modern warship before launching.

27. With this nose, the blue whale can create jets of water that shoot high above the water surface.

28. When snow covers the treetops, it creates a magical scene.

29. Maybe this is the reason why people call eggplants in English "egg plants"

30. How staff in an IMAX theater change a light bulb. A tip for when you want to change a bulb that is too high.

31. Taiwanese noodles are probably mistaken for textiles by many people.

32. Excavator said: As long as I have a fulcrum, I will scoop up the whole world for you to see.

33. Like how cars (red in the example below) cause traffic jams.

34. This is how a car's gearshift works.

35. For those who are not yet proficient, here is a guide on how to park.

36. How the key works .

37. The solution flows from the mouth to the stomach like this.

38. Dogs have a much more convenient natural cup than we do.

39. This is an X-ray of a dog drinking water.

40. The way our shirts/pants are woven together.

41. Packaged pasta is cut like this.

42. And here's how to make pasta

43. This is how plates are made.