Vous êtes-vous déjà demandé comment le verre de sécurité nous évite de devenir des piñatas humaines ? Il s'avère que tout repose sur ces couches astucieuses – quand il se brise, ces couches maintiennent les morceaux éclatés en place comme un chef, nous protégeant des éclats de verre volants. Incroyable, n'est-ce pas ? Mais hey, ce n'est que la pointe de l'iceberg ! Nous avons encore plein d'autres faits stupéfiants à révéler, alors préparez-vous à ce que votre esprit soit tordu en forme de bretzel ! Une fois que vous aurez entendu ces petites infos, vous ne pourrez pas vous empêcher de les partager avec tout le monde que vous connaissez. Croyez-moi, vous êtes parti pour une aventure décoiffante ! Animation créée par Sympa.
----------------------------------------------------------------------------------------
Musique par Epidemic Sound https://www.epidemicsound.com
Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna
----------------------------------------------------------------------------------------
Nos réseaux sociaux :
Facebook: https://www.facebook.com/sympasympacom/
Instagram: https://www.instagram.com/sympa.officiel/
Stock de fichiers (photos, vidéos et autres):
https://www.depositphotos.com
https://www.shutterstock.com
https://www.eastnews.ru
----------------------------------------------------------------------------------------
Si tu en veux encore plus, fais un tour ici:
http://sympa-sympa.com
----------------------------------------------------------------------------------------
Musique par Epidemic Sound https://www.epidemicsound.com
Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna
----------------------------------------------------------------------------------------
Nos réseaux sociaux :
Facebook: https://www.facebook.com/sympasympacom/
Instagram: https://www.instagram.com/sympa.officiel/
Stock de fichiers (photos, vidéos et autres):
https://www.depositphotos.com
https://www.shutterstock.com
https://www.eastnews.ru
----------------------------------------------------------------------------------------
Si tu en veux encore plus, fais un tour ici:
http://sympa-sympa.com
Category
😹
FunTranscript
00:00 Cotton discs have two sides.
00:02 If you take the time to look at them carefully, you will see that they have different textures.
00:06 In case you're wondering why, the side with the texture is used to put on the makeup,
00:10 and the flat side is used to remove it.
00:12 Book lover, this is for you.
00:16 The jackets that come with many books with rigid covers are not only intended to embellish the book.
00:21 They can also serve as a bookmark.
00:23 Just fold the pages you have already read under the inside of the jacket, and that's it.
00:29 The next time you take your favorite shirt, take a look at the buttonhole at the top.
00:33 It must be sewn horizontally, while all the others are vertical.
00:37 It turns out that the city shirt was designed this way
00:40 since the first and last button are the first to unbutton during the day.
00:44 They therefore modified the direction of the buttonhole
00:47 so that the shirt stays well adjusted before you are ready to remove it.
00:51 Nowadays, we have so many different versions of this incredible dessert
00:56 that it is difficult to imagine that we could have lived without it.
00:58 You can find almost everywhere different types of chocolate chip cookies,
01:01 in ice cream or even in cakes.
01:03 But this famous cookie only came to life in 1930.
01:07 The story goes that a woman named Ruth Grave Wakefield
01:10 was preparing chocolate cookies while waiting for her guests to arrive.
01:14 Very quickly, she realized that she no longer had pastry chocolate,
01:18 an essential ingredient to prepare classic biscuits.
01:20 To remedy this situation, she bought a half-sweet chocolate bar,
01:24 thinking that it would end up evenly distributed in the dough
01:27 given the heat of the oven.
01:29 Things did not necessarily go as she had planned.
01:31 But good for her, because that's how she invented this modern dessert
01:34 that we can no longer do without.
01:36 And speaking of popular snacks,
01:40 chips are even younger than chocolate chip cookies.
01:43 At least from a historical point of view.
01:45 There are many stories that try to explain how they were invented.
01:49 One of them is the following.
01:51 A chef named George Crum, based in New York,
01:54 created the chips in 1953.
01:56 He wanted to try a new cooking method
01:59 when one of his customers was full of his fries.
02:02 He said they were too thick and a little soft.
02:06 Crum then imagined finely sliced and fried potatoes
02:10 until they were brown.
02:12 People loved this dish and welcomed this very first batch of chips.
02:19 Ice cream, anyone?
02:21 If the story is true, in 1904, at the Saint Louis Universal Exhibition,
02:24 an ice cream vendor ran out of ice cream to serve his specialty.
02:27 He made a cone-shaped waffle,
02:30 and the rest is now part of history.
02:32 Okay, I admit it, similar products to chewing gum have existed since Ancient Greece.
02:37 So this discovery is not particularly revolutionary.
02:40 But the chewing gum we buy today
02:43 appeared at the end of the 1800s.
02:46 An American inventor named Thomas Adams
02:48 wanted to mix different chemicals to create synthetic rubber.
02:51 He tried and failed to exploit the properties of gum for his experiments,
02:56 but he ended up creating this delicious snack.
02:58 Today, people still use gum to make a certain number of chewing gums.
03:02 In the 1800s, a man named Jean-Baptiste Joly worked in the textile industry
03:07 as a fabric manufacturer.
03:09 The discovery of the following invention, which we use a lot nowadays,
03:13 has a little to do with him and more to do with his wife.
03:16 The story goes that the woman accidentally spilled a kerosene lamp on a tablecloth.
03:21 Instead of getting angry when seeing the damaged fabric,
03:24 Joly noticed that the substance had actually cleaned the fabric.
03:28 You already understood.
03:30 Yes, this is how the very first pressing was born.
03:33 A very clean accident, if I may.
03:37 Now, I love this one.
03:40 Did you know that the kerosene lamps were originally called "Friction Lights"?
03:43 In any case, it is the name that their inventor, a chemist named John Walker,
03:47 gave them in 1826.
03:49 One day, he scratched a chemical-made stick on his fireplace by pure chance
03:54 and realized that it was on fire and created sparks.
03:58 Originally made of cardboard,
04:00 they were then made from wooden rods and glass paper.
04:04 In the 1940s, a man named Harry Coover
04:08 came across a chemical formula that seemed to adhere to everything it touched.
04:12 The scientific community at the time did not think much about the question
04:16 because the formula did not seem to have much application at the time.
04:19 It was only in 1951 that he looked a little more at the formula
04:23 and decided to reuse it.
04:25 With another researcher, Distman Kodak, named Fred Joyner.
04:29 They used a complete name,
04:31 adhesive composition based on cyanoacrylate, methyl,
04:34 but you must know it under the shorter version, superglue.
04:37 It has so much use in terms of safety today
04:39 that it is difficult to believe that we did not invent it on purpose.
04:42 In 1903, a scientist named Edward Benedictus
04:47 dropped a bottle by accident.
04:49 Looking down, he was amazed to see that the bottle had slightly melted
04:53 but had retained its shape.
04:55 He expected it to break into a thousand pieces.
04:58 Intrigued by this unknown peculiarity until then,
05:01 he pondered the question and discovered that what kept the glass in place
05:05 was a substance, nitrate of cellulose,
05:07 which covered the inside of the glass.
05:09 This is how humanity discovered the glass of safety.
05:12 This is probably not what you imagine when you think of cashew nuts,
05:17 but a Reddit member found them like this in a store in Brazil.
05:21 In fact, these are not real nuts.
05:24 Cashew nuts emerge at the end of a cashew apple.
05:27 There is a special word for a fruit with a seed inside,
05:31 a "drop".
05:33 Cashew nuts are therefore drops,
05:35 just like almonds and pistachios.
05:37 Brazil is the homeland of cashew nuts.
05:40 The tree was then brought to India by the Portuguese in the middle of the 16th century.
05:44 From there, it spread to Asia, then to West Africa.
05:48 Today, these regions are the largest cashew nut producers,
05:52 but the United States is the largest consumer.
05:55 They import 90% of world crops.
05:58 Speaking of food, here are some interesting facts.
06:01 Did you know that pineapples grow this way?
06:04 In addition, they are not part of these fast-growing fruits.
06:07 It takes them between 16 and 24 months before they can be harvested.
06:12 Not to mention that a plant can only produce 3 pineapples at most in its lifetime.
06:17 Fun fact, each segment of a pineapple was once a flower.
06:21 Have you ever wondered why eggplant is called eggplant in English,
06:25 that is, "plant-oeuf"?
06:27 If you've never seen a eggplant grow, here's a picture.
06:30 Now you understand.
06:32 It literally looks like growing eggs.
06:35 In addition, eggplant is not a botanical vegetable.
06:38 They are berries, just like watermelons.
06:41 In fact, eggplant is not always purple.
06:44 They can also be white, green or even purple with white stripes.
06:48 You will never guess what it is.
06:51 It looks like a bouquet of flowers, but it's broccoli that hasn't been harvested.
06:55 These flowers are actually edible.
06:57 Broccoli has been known for at least 2,000 years.
07:00 It was the Romans' favorite food.
07:02 But it only appeared in North America in the 1920s.
07:06 It was brought to California by Italian immigrants who started selling it.
07:11 Today, the United States is the third largest producer of broccoli,
07:15 after China and India.
07:17 And here's what a artichoke becomes if you let it bloom.
07:20 An artichoke is actually a flower that hasn't had time to bloom.
07:24 It's also one of the oldest foods humans know.
07:28 Do you remember that a pineapple takes about two years to produce fruits
07:32 and that a plant can only bear three pineapples in its lifetime?
07:36 Well, an artichoke plant can grow up to 20 artichokes a year.
07:40 Artichoke is one of the healthiest vegetables in terms of antioxidants.
07:44 Here's a picture of a sleeping turtle.
07:46 Many of them sleep inside their shells to protect themselves from predators.
07:51 But some turtles can't retract in their shells,
07:54 so they sleep in positions similar to these.
07:58 These animals are active during the day and sleep at night.
08:01 The amount of sleep a turtle needs depends on the species.
08:05 It can range from 10 hours to one.
08:08 On average, a turtle takes a nap from 4 to 6 hours.
08:12 The most important factor for a turtle when it goes to sleep is to find a safe place.
08:17 They can hide under leaves or in holes in the ground.
08:21 Have you ever seen a chameleon's feet?
08:23 These creatures have two toes on the inside of their feet
08:26 and three on the outside, at the level of the front feet.
08:30 And it's the opposite for the back feet.
08:32 Chameleons live on trees, and their feet help them climb better.
08:37 We all know that chameleons have a unique ability to change color.
08:41 But they don't change it to camouflage.
08:43 In reality, color depends on the mood of the chameleon,
08:47 temperature, humidity, and light.
08:50 And did you know that some of them have a tongue that is twice as long as their body?
08:55 Have you ever seen a walnut's mouth up close?
08:58 They have teeth inside their beaks.
09:01 Walnuts are very loyal creatures.
09:03 It's not a myth that a bird attaches to the first stimulus in motion it sees after the explosion.
09:09 It doesn't matter if it's a walnut, a person, or even a simple object.
09:13 It will remain devoted to this creature or this lucky thing throughout its life.
09:18 Walnuts also mate for life, and they are very protective of their offspring.
09:23 If they lose a loved one, they cry for it.
09:26 If a walnut from a group falls ill or is injured,
09:29 two or three stay with it to protect and care for it.
09:33 This adorable little creature is a newborn alligator.
09:36 But don't be fooled by its cute appearance.
09:39 This little fellow is already about 60 years old.
09:42 It's not the DNA that determines the sex of an alligator.
09:45 It's the temperature.
09:47 If the eggs were laid when it was hot, bad alligators will hatch.
09:51 If they stay in colder temperatures, there will be a lot of females.
09:55 After hatching, an alligator takes 10 years to grow up.
09:59 Alligators generally live about 35 years in nature.
10:04 By the way, alligators cannot live in salt water,
10:07 unlike crocodiles, because they don't have a special gland to excrete the salt from their bodies.
10:12 Here is a newborn pigeon.
10:14 You've probably seen thousands of pigeons in your life, but probably never a newborn.
10:19 It's because newborn pigeons stay in the nest for about six weeks,
10:23 which is longer than any other bird.
10:26 When they come out of the nest, they look almost like adult pigeons.
10:30 No wonder you never noticed the difference.
10:33 In addition, they are probably the first domesticated birds by man,
10:37 and they are experts in navigation.
10:40 They can find their way home at a distance of 2,000 km,
10:44 which is more than the distance between New York and Florida.
10:48 We think that pigeons have an innate sense of direction.
10:51 In fact, in ancient times, the mail was distributed by traveling pigeons.
10:56 You may have noticed that there were sometimes small ridges on the top of the curtains.
11:01 It's more hygienic, because when you break it, you can press the curtain on it and it won't touch anything else.
11:07 Another safety device that you will find in your car this time is a strap on your rearview mirror.
11:15 With it, you can change the position of the mirror,
11:18 so as not to be blinded if there is a car behind you driving in the headlights.
11:22 This small strap helps you to control the glow of the lights coming from the rear.
11:27 This function appeared in the 1930s, but it was not until the early 1970s
11:31 that it became a standard equipment for most cars and other trucks.
11:36 Do you see this little hole on your iPhone, right next to the rear-facing camera?
11:41 It's a microphone.
11:43 And it's there so that your phone can record the sound when you rotate your camera.
11:47 Some cables have a thick cylinder towards the end of the cord.
11:53 This is what is called a ferrite core.
11:56 It's a magnetic ferrite oxide that stops electromagnetic interference at high frequencies.
12:01 Do you see, for example, this annoying static noise you get if you get your phone too close to a speaker?
12:07 It interferes with your call.
12:09 That's why cable cords with big cylinders are rather useful, because they prevent this kind of thing.
12:14 Do you know why almost all luggage bags and backpacks have two lightning fasteners?
12:21 It's much more practical and easier to open it that way.
12:24 But that's not all.
12:26 You can also lock these two lightning fasteners together so that the luggage inside your bags is safe.
12:31 You know how public places' toilets, like shopping malls, have these large spaces at the bottom of the door?
12:37 It's mainly for better air circulation.
12:41 This type of door also allows you to clean the toilets more easily
12:44 or check if they are occupied when you wait.
12:47 Apart from that, if you are stuck inside and the lock is broken, you still have a way to escape.
12:53 You can simply crawl out.
12:55 Have you ever noticed these plastic tips on the cutters?
12:59 The blade is also curved, which means you can renew it several times, always with sharp edges.
13:06 You can separate these pieces of blade thanks to these plastic tips.
13:10 Then you just have to move the sliding piece to push this new blade forward.
13:15 If you have ever taken a moment to examine a supermarket box,
13:19 especially its foldable section, you have probably noticed these metal loops that protrude.
13:25 They are designed to protect the items you carry in your trunk.
13:29 You can use them to hang bags containing soft items,
13:33 like bread that you don't want to accidentally crush with heavier products,
13:37 or things that are more easily broken, like eggs.
13:40 Many coffee cups have curved notches on their bottom.
13:45 When you wash your cups, place them against the drawer of your dishwasher.
13:49 This way, water will not accumulate inside and your favorite cup will be completely dry when you take it out of here.
13:56 If you are a fan of McFlurry, you have probably already noticed that there was a square hole in the handle of their spoon.
14:03 It is there so that you can attach it to this special machine that mixes the ice cream with your favorite toppings.
14:10 The machine has a bar that slides into this square-shaped spoon and that carefully stirs it.
14:15 And you are given this spoon to minimize damage during the process.
14:20 Pretty cool, isn't it?
14:22 An ordinary can of milk usually has a bump on the side.
14:27 Some may see a choice of random design, but this bump fulfills several objectives.
14:32 One of them is to inflate if there is an accumulation of gas.
14:36 This happens when your milk has turned.
14:38 So you don't even need to taste it to check.
14:41 In addition, the bump is there so that the bottle does not burst if you drop it accidentally.
14:45 It allows an expansion space that takes in the sudden pressure that occurs when you drop the bottle.
14:52 The dental floss.
14:55 It is obviously important to take care of your teeth and it is easy to guess how to use it.
14:59 But it is also great in the kitchen.
15:02 Because it is a very precise cake cutter.
15:05 Much more effective than an ordinary knife.
15:08 Most kitchen scissors have a keyhole right here in the center where the blades and handles meet.
15:16 It is something you can use to trim difficult herbs like thyme or rosemary.
15:21 Thanks to this opening, you don't need to remove the leaves by hand.
15:25 But you can tear them all in one move.
15:29 A large part of yogurt or flan skins are provided with an aluminum foil lid.
15:34 And in most cases, you can use this lid as a disposable spoon.
15:39 Just take it off and after a few simple folds, you will have a small spoon perfect for your 4 hours.
15:45 These little red spots that you sometimes see after breaking an egg are not worrisome.
15:51 These tiny blood stains can be caused by the rupture of a small blood vessel in the hen when she laid her egg.
15:58 Eggs with these blood stains can be consumed without danger.
16:02 But they can also be removed if it bothers you.
16:05 It won't affect the taste of the egg.
16:07 In the Toblerone logo and its famous mountain, the image of a bear standing on its hind legs is hidden.
16:14 And who is about to devour this yodeler over there?
16:17 No, I'm kidding.
16:18 This is explained by the fact that bears were very present on the side of Bern.
16:22 One of the largest cities in Switzerland, where its founder created the famous chocolate triangle snack.
16:28 Toblerone also relies on a word game between the creator's family name, Theodore Tobler,
16:33 and the Italian word torone, which refers to a nougat with honey and almonds.
16:38 The space located under a nougat is used to protect it during transport.
16:43 This technique is called intermediate suspension.
16:46 Not only are the nougats better protected in their polystyrene goblets, but they also soften more quickly and more uniformly.
16:53 You probably thought that this hole in the body of the pencils had no reason to be.
16:57 And yet there is one.
16:59 It is a ventilation system that allows the ink to flow more easily.
17:04 In this way, an equal air pressure is created inside and outside the pen,
17:09 which allows the ink to flow easily into the tip.
17:13 It is no coincidence that soy sauce bottles have two pouring cups.
17:17 The sauce is very liquid and flows quite quickly from the bottle as soon as it is turned over.
17:22 Most Asian cuisine lovers will admit that they have spilled it everywhere at least once in their life.
17:29 This is why, nowadays, restaurants prefer to serve soy sauce in special bottles with two pouring cups.
17:36 This design allows you to control the flow of sauce that flows.
17:39 Just put your finger on a cup while you pour the sauce over the other.
17:43 If you press your finger hard on it, the sauce will automatically stop flowing.
17:48 And if you remove it, it will flow again.
17:50 Now, I challenge you to get your fingers in your nose.
17:54 You probably noticed that the seats of trains and buses were covered with fabric with bizarro patterns.
17:59 Do you know why?
18:01 These patterns are used to cover dirt and stains on the seats.
18:05 The brighter the color and the more patterns, the harder it will be for a passenger to notice these disgusting stains.
18:12 In addition, these patterns are generally so ugly that no one wants to look at them long enough to reveal anything.
18:20 So yes, the pattern is there to make you look away and, if you look at it, to make it less visible.
18:26 No bus will ever have white seats. That's guaranteed.
18:31 The metal tab of the soda cans can be turned over and you can slide a straw through it,
18:36 which prevents you from having to put it back in place over and over again.
18:39 This tab replaced the pin created in the early 1960s.
18:43 You remember, don't you?
18:45 It could be very pointy and easily pose a threat to people in charge of sorting out the garbage.
18:51 Now you can insert your straw directly into one of them.
18:54 This also means that you can produce bubbles at will and make all your friends laugh like a three-year-old.
19:01 Sometimes, when you buy clothes, you get a plastic bag with an extra button and a piece of fabric.
19:08 If the fabric is used to plug holes, it can also be used to test the effects of various detergents on certain surfaces.
19:16 It is also convenient to test the washing cycles of your machine before using them to wash the entire garment.
19:23 The mechanical stairs are equipped with these hard-leather black brushes,
19:27 for the same reason that some of them have yellow lines on their steps.
19:31 It is about dissuading users from getting too close to dangerous places.
19:36 People don't always pay attention and sometimes clothes get stuck near the point where the step meets the edge of the stairs.
19:43 This brush is a small barrier that prevents this.
19:47 It also allows you to catch plushies and prevent other small objects from falling into the gaps.
19:53 The dishes containers that are most often associated with Chinese restaurants
19:57 are designed not only to bring dishes home, but also to store them in the refrigerator.
20:03 They can also be used as plates, since it is possible to eat directly inside without worrying about dirtying your dishes.
20:11 Yes, that's right, they were patented in 1894 to transport freshly chopped oysters and were known overseas under the name of Oyster Pails.
20:21 They were then adapted to serve as water containers for food.
20:25 Have you ever wondered why the coins had these little stripes on the edge?
20:30 It is a vestige of the time when they were much more valuable.
20:34 The smugglers could easily deny you the arrests to melt new gold or silver coins and make a profit.
20:40 These stripes were created to make it much easier to distinguish the coins that had been altered.
20:46 It is no longer necessary today, but coins still have this style.
20:50 All crackers and some biscuits have small holes in the middle to ensure that the final product will have the right texture.
20:56 These tiny holes allow steam to escape so that your biscuits do not break.
21:01 If you did not prick the dough, steam would accumulate inside
21:05 and the final result may be succulent, but it would have a rather strange shape.
21:10 Dogs like to turn around before going to sleep because they inherited this behavior from their ancestors.
21:16 At the time, there was no well-bred basket for doggies,
21:19 and most of them had to repel tall grass to create a small corner to crawl.
21:25 In addition, these movements made all the animals that could have hidden in the vegetation flee.
21:30 Donuts have this ring shape for a similar reason.
21:33 If there were no holes in the center, the dough would never be cooked enough.
21:37 In addition, they are often associated with the American police,
21:41 because in the 1950s, donut shops were one of the few places to stay open late at night.
21:47 It was the ideal place for the police who wanted to nibble a piece
21:51 or even take care of the paper during their night shift.
21:54 If your jeans are blue on the outside and white on the inside,
21:58 it is because the fabric has been woven in a judicious way.
22:01 The chain thread is dyed, while the strap thread has no color, it is simply white.
22:07 In this way, the manufacturers reduce the amount of dyeing required for each garment.
22:12 It's not as if they were gold-plated.
22:15 The workers of construction and sewing workshops are generally dressed in orange,
22:20 because this color is visible even in bad weather.
22:22 It is the most effective color to attract attention and alert people.
22:26 No wonder that many security vests and traffic lights are also orange.
22:31 The stop sign has an eight-sided shape to help drivers recognize it easily,
22:35 even if they see it from behind.
22:37 And when the signs were not yet reflective,
22:39 the octagonal shape prevented drivers from confusing the stop sign with any other at night.
22:45 The rough strips on the sides of the road are placed there to alert drivers who rush to the steering wheel.
22:50 When the tires pass on these strips, the noise and vibrations work like an alarm.
22:55 There are magnetic locks on the fuel pumps in the gas stations,
22:59 in case someone leaves with the gasoline gun still attached to his tank.
23:03 In this case, the lock automatically detaches the hose.
23:07 The gas turns a rainbow into a puddle of water, because it cannot mix with water.
23:12 It forms a thin membrane on top.
23:15 When the light reflects on it and on the water at the same time, you get a rainbow.
23:20 The three-way handle of a jerry can is there to allow two people to carry it more easily
23:25 and to distribute the liquid evenly.
23:28 Gas cans often have a second hole that must also be unlocked before pouring the liquid.
23:33 Air passage will prevent it from overflowing and therefore from wasting it.
23:38 Most gas cans have two holes with caps, one larger and one smaller.
23:43 You are supposed to unlock the smallest hole before pouring the liquid through the largest.
23:47 This will prevent the liquid from sticking and from spreading on your clothes and on the floor.
23:52 Another little trick that we often neglect is the tip of a cap.
23:56 Most tubes are usually sealed with a plastic film or an aluminum sheet,
24:01 and opening it with your nails is not the best idea.
24:03 The tip on the cap makes it easy to open even the most tightly sealed tube.
24:08 You can use most screwdrivers with a wrench to create more torque.
24:13 Simply place the wrench key on the handle of the screwdriver.
24:17 This way, you will need to apply much less force than usual.
24:21 You will also be able to reach more easily difficult areas of access.
24:24 Cameras are installed in shops, banks and hospitals to monitor everything.
24:29 If something happens, you can call the police or the emergency services.
24:32 The camera helps to resolve a lot of business.
24:35 So why aren't there any cameras in planes?
24:38 The crew keeps order in the plane, but they can't do anything if something serious happens.
24:43 Besides, there is nowhere to hide in a plane.
24:46 During the flight, the cameras are useless,
24:49 and after the flight, the passengers' statements work as well as the cameras.
24:53 So if the cameras are useless, why spend money on them?
24:58 Water is very easy to clean because it has triangular molecules
25:01 made up of an oxygen atom and two hydrogen atoms, hence the H2O.
25:07 These molecules have slightly different charges on their opposite sides, a bit like magnets.
25:12 This is why water easily attaches to other molecules, including those that make up saline.
25:17 Many individual houses have triangular roofs,
25:20 because it allows rain, snow and dead leaves to slip on the door.
25:25 If all these things piled up on the roof of your house, one day it could collapse.
25:30 When a storm approaches, the clouds seem to become dark.
25:34 But this is only an illusion. The thin clouds of a sunny day easily let the light through.
25:39 They also diffuse all the colors of the light spectrum.
25:42 This makes us perceive the clouds as being white.
25:45 The thicker the clouds are and contain droplets of water,
25:48 the less they let the light through and the darker they appear.
25:52 A good number of doors are made of brass, bronze or some alloys of copper.
25:57 These metals have an antigen effect.
26:00 Bacteria spread much more slowly on them.
26:03 They also get rid of microbes quite quickly, in a few hours.
26:07 But that doesn't mean you shouldn't wash your hands.
26:10 Diamonds have symmetrical shapes to show you their brilliance.
26:14 At first, these precious stones are not so beautiful.
26:17 They go through several stages of size and then become elegant pieces.
26:21 Most of these stones have a round shape with slightly pointed corners.
26:26 It is in this shape that diamonds shine the most.
26:29 Why are there two holes in an electric socket?
26:32 The left hole is negatively charged, the right hole is positively charged.
26:36 And the space below is the ground.
26:38 Electricity must flow through the circuit.
26:41 The current goes through the positive hole, through the charger of your phone, for example,
26:45 and then through the negative hole.
26:48 Have you ever wondered what your jeans pocket was for?
26:51 People used to wear watches to tickle.
26:54 The small pocket was designed for this purpose.
26:56 Today, no one wears this kind of watch, but the pocket has remained.
27:00 And you can slip small objects in there, like a ring.
27:03 In London, there are poles that look a bit like air lamps, but they don't have bulbs.
27:08 Their official name is "smoking pipe" and they belong to history today.
27:13 But they were very useful in the 19th century.
27:16 These hollow poles evacuated the air and the smelly explosive gases to avoid, let's say,
27:21 unwanted consequences.
27:25 Most kitchen scissors have metallic teeth that look like pliers in the middle, between the handles.
27:30 They can help you break nuts, crab shells and other hard products.
27:34 You can also use them to open jars and bottles or remove the stems of herbs.
27:39 Leather often looks dull to the eye because it is covered with tiny scratches and scuffs.
27:44 They scatter the light that hits the material.
27:47 When you put on your shoes with a layer of wax, you fill these tiny crevasses.
27:52 The surface becomes smoother and the light rays bounce back more uniformly.
27:57 That's why leather then takes a brighter shade.
28:00 The crevasses are filled with a special fluorescent, semi-transparent ink
28:04 that can shine in low light.
28:06 Yellow and light green shades are the most popular,
28:09 because they don't prevent you from seeing the text after a black and white photocopy.
28:13 Photocopiers perceive yellow and light green marks as very pale and don't print them.
28:18 We make horse-made magnets, because they increase the magnetic force.
28:23 Colors are also important.
28:25 The blue part indicates the South Pole and the red part the North Pole.
28:29 Both poles work simultaneously and increase the attraction force.
28:33 Well, I know it's a bit cold or touchy, especially during a winter ice day,
28:38 but did you know that brass door handles are actually really useful for something,
28:42 in addition to being elegant and shiny?
28:45 Because it's made of copper, brass has antimicrobial properties.
28:50 That means it can help eliminate germs and harmful bacteria,
28:54 sometimes in less than two hours.
28:56 In very busy places, it's even more useful.
28:59 But since brass is much more expensive than other metals, like nickel and steel,
29:03 we don't see many door handles of this type anymore.
29:07 Speaking of beautiful polyvalent objects,
29:09 most screwdrivers have a little secret that's unique to them.
29:13 They can sometimes slip into a key to create more torque during torsion.
29:18 Not to mention their usefulness when it comes to screws located in difficult places to access.
29:23 There's a reason why women's shirt buttons are for left-handed people,
29:27 and it has nothing to do with fashion.
29:30 This practice dates back to the time when women in chambers helped ladies get dressed,
29:34 and it was easier for them to do their job with this orientation.
29:38 The fact that the buttons are placed this way is a sign of wealth.
29:42 It's easy to imagine why this practice has been perpetuated,
29:45 even though most people dress like this nowadays.
29:48 The next time you receive a package in your mail, take a look at the cutter.
29:53 If it has diagonal lines on the blade,
29:55 you'll benefit from a small design advantage.
29:59 It turns out that the blades break.
30:01 If you cut continuously from the cardboard, you can use the sharp edge of the blade.
30:05 To avoid having to buy a brand new cutter,
30:08 the upper segment of the next line can break to get a new super-sharp edge.
30:13 To do this, look at the small hole at the base of the tool, sometimes called the blade breaker.
30:19 The people who came up with this brilliant invention
30:22 are engineers who were inspired by the way chocolate bars are divided.
30:26 Wait a minute! Don't throw this package in the trash right away.
30:30 It's very likely that you have a bag of silica gel somewhere in the back of the box.
30:35 As this gel is a drying tool, it absorbs moisture from its environment,
30:39 so that you can keep these bags for other occasions.
30:43 If you need to dry your phone or another electrical object,
30:46 you can put it in a container next to the silica gel to reduce damage.
30:51 You don't need to be a mechanic to know when the tires of a standard car need to be replaced,
30:56 because they are equipped with a well-designed indicator.
30:59 If you look closer, you will see that the tire strips are made up of a pile of rubber notches.
31:05 When the marks are equal to the perpendicular bars,
31:08 this is a sign that you have to make an appointment with your local car service,
31:12 because it is very likely that the tires have lost most of their traction force
31:16 and that they are no longer safe for driving.
31:19 The upper corners of a car's windshield have textured black dots integrated into the edge of the glass.
31:25 This detail is not there for design reasons.
31:27 It is a coating in fritz,
31:29 which means that a special type of ceramic paint is added to the glass
31:33 to protect its sealant seal from UV rays.
31:36 It also allows you to conceal and create a coarser surface for the glue used to put the glass in place.
31:43 Every time you hit the road, check if there is a small strip under the rearview mirror of your car.
31:48 I bet you didn't know it was there to help you switch from day vision to night vision.
31:54 It uses prismatic glass technology to blur the reflection
31:58 and reduce the glare of the headlights behind you in traffic.
32:02 These manual rearview mirrors were invented in the 1930s,
32:06 but they became the norm in the 1970s.
32:10 When you're in the car, take a look at the headrests,
32:14 because you probably don't know they have a hidden function.
32:17 Of course, they can be adjusted to suit all sizes of passengers,
32:20 so that they benefit from adequate support for their heads and necks.
32:24 The hidden feature is that they are detachable and have two very solid metal bars.
32:30 If you ever get stuck in a car and you have to get away quickly,
32:34 these bars can be very useful to break the car windows.
32:38 So you're driving around and you suddenly run out of gas.
32:42 What I'm about to describe to you looks more like a joke than a real situation that could happen.
32:48 But what happens if you're in such a hurry that you accidentally leave with the gasoline gun in the tank?
32:56 Well, the guns were designed to avoid any risk.
32:59 Don't worry, they have a separation device that allows the pipe to be detached
33:04 when you pull it back with enough force.
33:07 Initially designed in the early 20th century to be worn exclusively by basketball players,
33:13 basketballs have quickly become one of the most fashionable,
33:17 just like jeans and leather jackets.
33:20 If you look at them closely, you'll see that they have two additional holes on the side,
33:24 similar to those on shoe laces.
33:27 They are made like this not only to provide additional ventilation,
33:31 but also to allow people to be more creative with their laces when they wear their shoes.
33:37 Admit it, you've always thought that the bars are joined at one end
33:41 with the sole purpose of keeping them together until you're ready to start your meal.
33:45 That may not be quite true.
33:48 If you look at them more closely, you'll see that these wooden tools have a square-shaped end.
33:53 The bars made in this way are from an old Japanese traditional design
33:58 that allows you to break the ends easily.
34:01 The separate end can then be used as a support for the bars
34:05 to keep them cleaner in the hope that they can be reused
34:09 and that they won't touch the table or any other surface.
34:12 Women's bikes have a special design that surprisingly has a historical and fashionable function.
34:18 The lower frame is largely intended to compensate for the generally smaller size of women
34:23 compared to that of a normal man.
34:26 If this is the case for the handlebars and the saddle,
34:28 the general frame is lower for an additional reason.
34:31 At the time when women wore long skirts and dresses all day,
34:35 they had to make sure that their skirts didn't get stuck in the frame.
34:39 This is how we designed a bike with a lower frame,
34:42 perfectly suited to women and their needs at the time.
34:45 The fact that the teeth are multicoloured is not just a nice advantage
34:49 to make dental hygiene more fun.
34:52 There is a secret explanation for each colour, dating back to the 1970s.
34:58 At that time, people were increasingly interested in their oral health
35:02 and were looking for products that could do more than just clean the teeth.
35:07 A company was the first to do this by adding a mouthwash to its toothpaste,
35:12 that is, the blue strip.
35:14 It then added the red strip, which contains ingredients that help you take care of your gums.
35:20 Speaking of toothpaste, check the cap the next time you open a new tube,
35:24 you might get a little surprise.
35:26 There is a kind of pointed cone inside the cap,
35:29 which allows you to pierce the toothpaste seal without cutting yourself or damaging your gums.
35:34 Not to mention that it's more hygienic,
35:36 since you won't be able to transfer germs or other bacteria into the product itself.
35:41 As for the articles to be placed on the counter of the bathroom,
35:44 toothbrushes are equipped with a very practical accessory,
35:47 hidden in the hairs.
35:49 In addition to giving the toothbrush a cooler look,
35:52 they also have a practical purpose.
35:54 Most toothbrushes have a blue hair pattern interwoven with white hairs.
35:59 This blue tint is intended to brighten up
36:02 to indicate when you should replace your toothbrush.
36:05 Dentists say that toothbrushes should be replaced every 3 to 4 months,
36:10 but this gives you a good reminder in case you forget.