I make a popular science video and all the emperors learn from it!

[Science popularization short video collection series 7. ]

[Nineteen, popular science of cold knowledge in life. ]

[Hundreds of millions of cold knowledge, those things that are completely different from the original design, how many do you know? ]

[1. Yellow light. ]

[Originally it was used to remind drivers to slow down, but now many people speed up when they see the yellow light. ]

[2. Homework. ]

[It was used to punish students at first, and then gradually became a part of learning. ]

[3. Treadmill. ]

[It was originally a torture device used to reform idle prisoners. ]

[4. Coke. ]

[It was originally used as a medicine, but who knew that it tasted better and better, and suddenly became the world's best-selling drink. ]

[5. Electric saw. 】

[It was originally invented to assist women in childbirth under special circumstances. The purpose was to help doctors cut the pelvis, not to cut wood. 】

[Six, high heels. 】

[It is designed for men and is a secret weapon invented by the Persians, because flat shoes are easy to slip when riding horses. 】

[7, stockings. 】

[It was originally designed for men, and only men in the upper class could wear them. King Louis XIV of France liked to wear stockings to show off his beautiful legs. 】

[8, sanitary napkins. 】

[It was originally designed to stop bleeding for battlefield wounded, but its function was too powerful and later evolved into a product exclusively for women. 】

[...]

........................................................................................

Because the video is accompanied by pictures, the ancients can understand what it is talking about.

"Homework is a good thing, we must use it! Teacher, hurry up and give my child homework!"

"Treadmill? Go out and run if you want to run. Why do you need a treadmill? Take off your pants and fart!"

"Oh my god, a chainsaw! This thing looks like it's used to cut corpses? You told me it's for delivering babies?"

"Wow, these stockings look cool, and they look good on men too."

"Hmm? Brother, you're not right!"

"......"

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Han Dynasty.

Liu Che watched with great interest.

"Interesting, interesting."

After seeing the stockings, he was stunned for a moment.

The woman in the video was wearing stockings for display on her legs. For some reason, he had an instinctive urge to see this thing!

If I could put it on my beloved concubine...

LiuChe coughed twice, and secretly opened the credit mall, and found that they were really for sale!

Black, white, fishnet, pink stockings, everything is available.

Liu Che closed the page calmly and looked at the high heels again.

At this moment, even he doubted it.

Is this thing really invented for men to get on the horse? !

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The Three Kingdoms period.

Cao Cao was extremely excited.

As a qualified wife control, there is no reason not to buy stockings and high heels when you see them!

Get them all!

I will give them to my wives and concubines in the evening!

After finishing his business, Cao Cao looked at the strange-shaped and unknown sanitary napkins.

"Can this thing be used to stop bleeding on the battlefield?"

Cao Cao stared at the thing in his hand with disdain. It was soft to the touch, like cotton.

He picked up the wine glass and sprinkled water on it.

The next moment, a surprising scene happened!

The water sprinkled on it did not spill out at all!

"Huh?? This thing can stop bleeding, I think it is more like sucking blood!" He was dumbfounded.

How can this thing stop bleeding? Does it suck people's blood dry?

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[Video continues.. ........ ]

[High-speed rail cold knowledge.. ........ ]

[There are no seat belts on the high-speed rail because the high-speed rail is too fast. If it stops suddenly, the damage caused by the seat belt is far greater than the protective effect. ]

[And the real protective effect is the anti-collision seat in the front row of the seat. ]

[The high-speed rail does not run late at night because the technology of the high-speed rail is sophisticated and the operation wear is large. ]

[Every night, the staff will check every detail of the high-speed rail and its tracks. 】

[Before the train is put into operation, a 'safety confirmation car' is usually sent out to eliminate hidden dangers again to ensure that everything is safe. 】

[High-speed rail is cleaner than you. 】

[Take a bath every two days, in a dedicated automatic bathhouse, with softened water and shower gel to reduce skin damage, and a bath master to serve you, so you can go out clean and white. 】

[...]

[Cold knowledge about sleeping. 】

[Although taking a nap is good, taking a nap for more than an hour is harmful to the body. 】

[According to a study by the Sleep Research Society, naps can improve the cognitive level of the brain, especially for adolescent students, naps will improve their academic performance and even increase their sense of happiness. 】

[But taking a nap for more than 1 hour will increase the risk of diabetes, fatty liver and middleThe prevalence of obesity. 】

[Ah, do you take a nap? 】

1.3

[...]

.....1.3........................................................................

"High-speed rail, it turns out to be so precious, like a young lady."

"What the hell, you can't sleep for more than half an hour at noon!"

"Fuck! I sleep for an hour every day, no wonder I feel more and more sleepy and my body becomes weak. I thought it was because I indulged too much in recent days."

"Hey! Brother, don't quibble. Look at your haggard appearance. It's because you indulged too much. Don't doubt it."

"I'm so happy. Now I can sleep in every day at noon. I'll tell my mother now."

"......".