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Transcript

00:00Come on, grab your phone. Now, turn it around.

00:04Do you see this point between the lens of the camera and the flash?

00:07It's a small microphone. I bet you didn't know what it was.

00:11What is it doing there?

00:13Well, when you're on the phone, this little hole takes care of reducing the background noise

00:17that the main microphone captures while you're talking.

00:20And yes, without it, your calls wouldn't be as clear as they are.

00:24You got lost in the woods and you're trying to find your friends.

00:27You suddenly remember that you have something that can help you.

00:30You grab one of the chest straps of your backpack and you whistle in it.

00:35And yes, today many bags are equipped with this function,

00:38especially those that are made for the outside.

00:41And it doesn't take long, very quickly, you hear the call of one of your friends

00:45and you follow him to the campfire, saved by this object that you never thought of.

00:50If you're curious, you may have already wondered what this little pocket in your jeans is for.

00:55You know, the one that's inside one of your front pockets.

00:59It's often used to store coins and bills, but that's not why it's made.

01:03In fact, it's designed to store your watch.

01:07Well, maybe that's where the term pocket watch comes from.

01:11You finally get home after a long day at work.

01:14You obviously don't want to cook, so you sit on the couch,

01:17you watch TV a little and you order a dish to take away.

01:21Chinese cuisine? Good idea.

01:23You ring the doorbell, it must be your meal.

01:26It smells deliciously good.

01:28Wait, before taking the plates, do this.

01:32Open the container in which your dinner arrived directly on the table.

01:35It's perfect as a plate and it's in cardboard,

01:38which means there's no dishes to do afterwards.

01:41The soda can that you have delivered with your dish also has a nice function.

01:45Look at the little metal tab, the one you use to open the can.

01:50Well, guess what? You can put your straw in there.

01:53In fact, that's exactly what it's made for.

01:56Go ahead, try it.

01:58You can't escape the fact that the letters on your keyboard are arranged in a very particular order,

02:03and French keyboards are no exception.

02:06Here is an American keyboard, one of the most common.

02:09The keys are arranged according to what is called the QRT arrangement,

02:13named so because of the first six keys located under the numbers.

02:17It turns out that this has not always been the case.

02:20They used to be arranged in alphabetical order,

02:23which is more logical when you think about it.

02:26The alphabetical arrangement fell into disrepair

02:29because a long time ago there were things called writing machines.

02:33Do you remember?

02:35You pressed a key and a character bar appeared to hit an inked ribbon

02:39and stamp a letter on a piece of paper.

02:42Over time, the keyboards managed to write very quickly.

02:45Too quickly.

02:47The character bars ended up getting stuck in each other,

02:50which disrupted the process.

02:52To solve this problem,

02:54we made keyboards whose keys are arranged in disorder.

02:58The new arrangement worked better because it made the hit more difficult,

03:02which helped to slow down the typists

03:05and prevent the character bars from getting stuck.

03:08It's much better.

03:10Today, no more character bars, no more writing machines.

03:13They are still quite fast in our time,

03:15but I can't help but wonder who was going the fastest,

03:18them or us?

03:20Keyboards have another hidden feature.

03:22Have you ever noticed these little bumps at the bottom of the F and J keys?

03:26Well, they are there to help us locate ourselves on the keyboard

03:29without having to leave the screen of the eyes.

03:32You may be used to taking a coffee to take to your favorite establishment

03:36to wake you up in the morning.

03:38But when you get home or to your workplace,

03:41you may be afraid to stain your desk by putting your coffee on it.

03:45Don't worry.

03:46This plastic lid is not only there to keep your coffee warm.

03:50It also acts as a cup holder.

03:53In fact, your cup fits perfectly in it.

03:56Try it.

03:57The following trick will be very useful to you if you like to cook at home.

04:01If you are like me,

04:02you may have a hard time figuring out

04:04how much pasta you need for a single portion.

04:07Well, if you have a spoon, go get it.

04:10Most people don't know what the little hole in the middle is for

04:13and assume it is there to allow the water to flow.

04:16But in fact, it is used to measure a perfect portion.

04:20Before cooking,

04:21put as much dry spaghetti as you can in this hole

04:24and you will know how much to use.

04:27When you go to a store to buy tins,

04:29you may notice that those that are made of plastic

04:32are cheaper than those that are made of wood.

04:34There is a good reason for this.

04:36Wood tins are made of cedar.

04:39The big difference between the two

04:41is that wood tins repel insects and mites.

04:44They are also stronger and last longer,

04:47which is perfect for this object

04:49that usually stays in your cupboard for a long time.

04:52Looking at your toothbrush,

04:54you may have noticed that it has blue hairs.

04:56They are not there just to look pretty.

04:59In fact, they are used to know

05:01when we need to change toothbrushes.

05:03These hairs lose their firmness and color

05:06when the brush is used,

05:07which means that it is time to get rid of them.

05:10Microwave ovens often look like mini-TVs,

05:13especially those in which this black frame is clearly visible.

05:17This is a very important feature

05:19that prevents the waves from escaping.

05:22This structure is actually a Faraday cage.

05:25Thanks to it, you can stand next to a microwave

05:28without instantly turning into a puddle.

05:31This does not mean that you have to spend your day

05:33in front of your microwave watching your food heat up,

05:36but at least you know that you will not wake up

05:39with an extra ear the next morning.

05:41Some ovens have a drawer in their lower part.

05:45It is tempting to use it to store food

05:47that you do not use often.

05:49But there is actually a better use for it.

05:52You should rather use it to keep the food

05:55that is waiting to be served hot.

05:57You can take them out of the oven

05:58and store them directly in this drawer,

06:00which frees up space

06:02so that you can continue to cook.

06:04Now, you are in a plane.

06:06You look around you,

06:07trying to pass the time before taking off.

06:10By examining the window,

06:11you notice that it has a very small hole just below.

06:15Do not worry, the window is not broken.

06:18It is there to reduce the pressure that accumulates

06:20as the plane goes up and down.

06:23It also allows the air to circulate.

06:25Now, raise your hand if you have already been on an escalator

06:28and you rubbed your shoes on the kind of brush

06:31that is on the side.

06:32I do it myself quite often,

06:34maybe more than I should.

06:36But these hairs are not there to clean your shoes.

06:39It is an important security device.

06:42It prevents your laces and your clothes

06:44from getting stuck in the mechanism,

06:46which avoids you a lot of discomfort

06:48when you go down.

06:49Sometimes you find a piece of fabric with your new dress.

06:53In general, it is accompanied by additional buttons

06:56in a small plastic bag.

06:58You may think that it is there to allow you

07:00to crumple your clothes in case you tear it,

07:03but it is not at all.

07:05In reality, you are supposed to put it in your washing machine

07:08to find out how it reacts to different washes.

07:12Now you have nothing to fear

07:14that your new coat shrinks,

07:16because you will know in advance which program to use.

07:19Bubbles, who does not like bubbles?

07:21Most people remember with emotion

07:23the bubble blowers of their childhood.

07:25But as we grow up, it is rather in our foam bath

07:28that we take pleasure with bubbles.

07:30After a hard day's work,

07:32there is nothing better than diving into a good hot bath.

07:35Not true, friends?

07:36And bubbles do more than clean you.

07:39If they are high-quality bubbles,

07:41they also serve as thermal insulators.

07:43They make sure that your bath stays warm longer.

07:46There are sometimes mysterious holes in the chocolate boxes.

07:50When I eat a box or two,

07:52I usually ignore them,

07:54and I remove the chocolate by pressing on the bottom of the plastic.

07:57But in fact, this is not the right method at all.

07:59If you press on one of the holes,

08:01the chocolate comes out as it is.

08:03So I'm going to do that from now on.

08:05It's on the web.

08:07Here is another little kitchen secret.

08:10The handle of a saucepan is often pierced with a hole.

08:13Most people use it to hook their saucepan to a hook

08:16as an easy storage method.

08:18But this hole has another use.

08:20When you cook, you can use this handle

08:23to put your wooden or plastic spoon.

08:25This allows you not to dirty your work plan when you put it down.

08:29Glass bottles are usually equipped with a cap.

08:32It's normal.

08:33Without it, the liquid would simply spread.

08:36In this cap, there is a plastic lining

08:39which apparently has no use.

08:41But it's wrong.

08:42It's a sealant.

08:44It's thanks to it that your drink stays sparkling.

08:47Ah, exactly the refreshment I needed.

08:51Many door handles are made of brass.

08:53And it's not by chance.

08:54They are made of this specific material

08:56because it's the worst enemy of bacteria.

08:59It's true.

09:00They are destroyed.

09:01Perfect for those who want to keep a clean house

09:03and avoid microbes.

09:04So, let's go fishing?

09:08So, you're hungry,

09:09but you don't really want to make a meal

09:11as a very flat dessert.

09:13What would you say about instant noodles instead?

09:15At the end, your stomach grumbles,

09:17but there is a problem.

09:19The polystyrene cup is broken

09:21and the noodles are outside.

09:23Wait.

09:24What is this space at the bottom of the cup?

09:26But why?

09:28This space is intended to protect the noodles.

09:30It's not the company that tries to save money

09:33or anything like that.

09:35Notice how the ramen in the cups

09:37is almost never broken,

09:38while the one in the package

09:40comes out in bad shape.

09:41This technique is called an intermediate suspension.

09:44The noodles are tight

09:46to prevent them from being crushed

09:47in the delivery truck.

09:49It's not just to make the noodles look beautiful and long.

09:52It's also to make sure

09:54that these delicious noodles

09:55are softer and more regular.

09:58Morning wool is not the best.

10:00Fortunately, there is an easy way

10:02to get rid of it.

10:03Obviously, everyone thinks

10:05that the mouthwash was invented to

10:07wash your mouth.

10:09Well, no.

10:10The mouthwash was originally invented

10:12and sold as a cleaning agent for the floors.

10:15It was sold to hospitals as an antiseptic

10:17for years,

10:18but it never really took off.

10:21A marketing genius renamed it

10:23mouthwash.

10:24The rest is a fresh story.

10:27So, after cleaning your teeth,

10:29don't forget that, sometimes,

10:31repositioning a brand

10:32can be very effective.

10:35It's hard to imagine a world

10:37without the Internet nowadays.

10:39No streaming, no online games,

10:41no pictures of cute kittens.

10:43Yes, I know that's not why it was designed,

10:45but who cares, right?

10:47The Internet prototype

10:49was called ARPANET,

10:51acronym for Advanced Research Projects Agency Network.

10:58This machine was very sensitive.

11:00To prevent anyone from turning it off,

11:02an intelligent scientist

11:03glued a piece of paper on it

11:05with its striking words.

11:07This machine is a server.

11:09Don't turn it off.

11:10It was written in red ink,

11:12nicely drawn.

11:14The fact that your teacher

11:15scribbles in the margins of your notebook

11:17is not really new.

11:18Except that the margins

11:19were not designed for that.

11:21It's a protection against rats.

11:23At the time,

11:24rats were constantly nibbling on paper.

11:26So, if you wrote something

11:28on the edge of the sheet,

11:29well, it ended up

11:30in the stomach of a hungry rat.

11:33A few well-placed margins

11:34prevented your best answers

11:36from being eaten.

11:38I can't finish this pizza.

11:40It's time to cover up the leftovers.

11:42Fortunately,

11:43I have a lot of plastic film.

11:45A little pull

11:46and the roll comes off.

11:48Cool!

11:50If you look at the packaging,

11:52this long and thin box,

11:53there is a small feature

11:55that can help you.

11:56A cardboard tab

11:57at each end.

11:58Push them inside

12:00and the roll

12:01will no longer be able to move.

12:02It's strange

12:03that I've never seen them before.

12:05If you ever find yourself

12:07stuck in the trunk of your car,

12:09stay calm.

12:10All cars

12:11are supposed to be equipped

12:12with an emergency lock

12:13that allows you to open

12:14the trunk of the interior

12:15if necessary,

12:16which is very unlikely.

12:18These locks are so well designed

12:19that they can be opened

12:20by anyone

12:21and at any age.

12:23In addition,

12:24the handles are designed

12:25to be bright in the dark.

12:27You can even pull them

12:28with your mouth

12:29if there is not enough room

12:30to use your hands.

12:31And this,

12:32no matter how

12:33you landed in this trunk.

12:35Change of subject.

12:36If you work

12:37with wire and a needle,

12:38do not forget

12:39that it is not necessary

12:40to plant the needle

12:41directly into the coil.

12:43You risk losing it,

12:44not to mention

12:45that you could easily

12:46prick yourself

12:47and hurt your finger.

12:48Nowadays,

12:49many sewing kits

12:50are equipped

12:51with a place

12:52reserved for needle storage.

12:54It is located

12:55at the bottom

12:56of the wire coil.

12:57Just take it out.

12:59It is even possible

13:00to store several needles

13:01at the same time.

13:02Throwable pencils

13:03have a little secret.

13:05Have you ever noticed

13:06that on some of them

13:07there is a small hole

13:08in the plastic part?

13:10It is actually

13:11the result of a basic

13:12ventilation system.

13:13It is supposed

13:14to allow the ink

13:15to easily reach

13:16the tip of the pen.

13:17OK,

13:18I know it is a super common

13:19reflex,

13:20but it is not really

13:21necessary to shake

13:22the spice dispensers

13:23to get the product out.

13:25You do not believe me?

13:26You are not the only one.

13:27So go get your

13:28salt or pepper bottle

13:29in your closet.

13:31If it has

13:32one of these

13:33removable plastic caps,

13:34it is perfect

13:35for this experience.

13:36Instead of shaking

13:37the bottle,

13:38try to hold it

13:39by the plastic cap

13:40while it is upside down.

13:41Turn the bottle

13:42slowly from one side

13:43to the other

13:44and you will see

13:45that the spice will flow

13:46without you having to

13:47shake the bottle

13:48and make a mess

13:49in your kitchen.

13:50In the same order of ideas,

13:51most salt dispensers

13:52and pepper dispensers

13:53have strips

13:54at the bottom

13:55of the upside down part.

13:56In case the seasoning

13:57gets stuck inside,

13:58place the bottom

13:59of the salt dispenser

14:00against the bottom

14:01of the pepper dispenser

14:02and make little circles

14:03so that the crepes

14:04stick together

14:05in each other.

14:06The spice should

14:07now flow

14:08easily without you

14:09having to open

14:10the bottle.

14:11When it is cold,

14:12it often happens

14:13that you wear

14:14so many layers

14:15of clothing

14:16that you no longer

14:17feel the straps

14:18of your handbag

14:19or your backpack

14:20on your shoulders,

14:21not to mention

14:22the speed

14:23with which they slip.

14:24Some jackets

14:25have an integrated solution

14:26to fix this problem

14:27in the form of

14:28a small strap

14:29on the shoulder

14:30with a hook

14:31or a button.

14:32It is designed

14:33to open and close

14:34easily

14:35so that you can

14:36keep your handbag

14:37in place

14:38all the time.

14:39Most of the time,

14:40a peeler

14:41is only used

14:42to remove the skin

14:43of potatoes,

14:44carrots or cucumbers.

14:45But you can also

14:46use your vegetable peeler

14:47to cut thin

14:48slices of onion.

14:49All you have to do

14:50is cut the onion

14:51into four vertically

14:52and then start

14:53to slice it.

14:54This can also

14:55prevent you

14:56from crying

14:57with your onion.

14:58Most people

14:59don't pay attention

15:00to this,

15:01but if you ever

15:02look closely

15:03at your toothpaste tube,

15:04you will certainly

15:05see small colored drawings,

15:06whether they are dots

15:07or squares.

15:08Colors can vary.

15:09They can be black,

15:10green,

15:11red

15:12or even blue.

15:13These colored dots

15:14are actually

15:15intended to help

15:16the toothpaste assembly

15:17machines.

15:18They allow you

15:19to know

15:20where and when

15:21these machines

15:22have to cut

15:23the toothpaste tubes

15:24and fold them

15:25to pack them.

15:26Look at your shoes.

15:27If there is an element

15:28that seems

15:29a little strange to you,

15:30know that it is

15:31always there

15:32for a good reason.

15:33Most manufacturers

15:34do not add

15:35a shoe

15:36just for fun.

15:37It would be a waste

15:38of time and money,

15:39you can imagine.

15:40On winter shoes,

15:41for example,

15:42there is often

15:43a small loop

15:44at the top and back.

15:45It is there

15:46to help you

15:47put them on

15:48because you can

15:49quickly adjust it

15:50by pulling on it.

15:51In addition,

15:52it also allows you

15:53to suspend the soles

15:54somewhere,

15:55probably

15:56to dry them

15:57because most

15:58of these little boots

15:59are designed

16:00to be worn

16:01during the coldest

16:02and humidest months.

16:03I admit

16:04that I don't like

16:05having to put everything

16:06in my suitcase,

16:07but it becomes problematic

16:08when it comes

16:09to sitting down.

16:10What do you do

16:11with your coat

16:12or your jacket?

16:13The next time

16:14you take the plane,

16:15look closer

16:16at the seat in front of you.

16:17The hook

16:18that holds the tablet

16:19vertically

16:20can be used

16:21as a hook

16:22for your jacket.

16:23As long as you

16:24do not need

16:25to have a meal

16:26during the flight,

16:27you can use it.

16:28Most mascaras

16:29expire

16:30in a delay

16:31of 3 to 6 months

16:32according to the manufacturers.

16:33By constantly pumping

16:34the mascara brush

16:35to try

16:36to distribute

16:37more products,

16:38lots of air

16:39enter the tube.

16:40The mascara dries

16:41much faster

16:42and it wears out

16:43faster

16:44and no longer

16:45fulfills its mission

16:46as before.

16:47There is a simple way

16:48to check

16:49if your mascara

16:50is still good

16:51enough to be used.

16:52If you don't hear

16:53a little plop

16:54when you take out

16:55the brush,

16:56you may need

16:57to buy a new one.

16:58I know that we live

16:59in the era of devices

17:00connected by Bluetooth,

17:01but for a sound

17:02of better quality,

17:03it is always recommended

17:04to use headphones

17:05that connect

17:06via audio jacks.

17:07Do you remember

17:08noticing black stripes

17:09on these jacks?

17:10They are not there

17:11only to hold them

17:12when you plug them

17:13into your phone

17:14or laptop.

17:15Made of a special

17:16insulating material,

17:17these bands

17:18are intended

17:19to protect the wires

17:20during the sound

17:21transmission.

17:22Depending on the number

17:23of bands,

17:24you can guess

17:25which end

17:26goes where.

17:27An empty space

17:28under the nozzles

17:29does not mean

17:30that the company

17:31wanted to scam you

17:32by depriving you

17:33of a complete portion.

17:34No, no.

17:35It is a way

17:36to protect the nozzles

17:37during their transport.

17:38It also facilitates

17:39the circulation

17:40of hot water

17:41that is poured

17:42on the nozzles

17:43before it is

17:44tasted.

17:45This V-neck

17:46was originally designed

17:47to meet

17:48several objectives.

17:49First of all,

17:50it is a way

17:51to extend

17:52the lifetime

17:53of the garment

17:54that will keep

17:55its shape

17:56over the years.

17:57It also serves

17:58to pass the head

17:59through the sweater

18:00so that it is

18:01easier to pull.

18:02In this way,

18:03it provides

18:04a better grip

18:05around the neck.

18:06Finally,

18:07it helps

18:08to absorb

18:09sweat

18:10if you wear

18:11the jacket

18:12during a sports session.

18:13It is no longer

18:14a common practice,

18:15but you may

18:16one day

18:17fall on a jacket

18:18with a mysterious

18:19additional pocket

18:20on the right side.

18:21It turns out

18:22that this pocket

18:23was once used

18:24by men

18:25to easily access

18:26their train tickets

18:27because most of them

18:28went to work

18:29without

18:30an additional pocket.

18:31Today,

18:32it is no longer

18:33a useless decoration.

18:34Speaking of things

18:35that we no longer

18:36use today,

18:37or at least

18:38not in their initial purpose,

18:39did you know that

18:40Play-Doh

18:41was originally

18:42a cleaning product?

18:43In the 1920s,

18:44industrialists

18:45needed a product

18:46that would help them

18:47clean the upholstered area

18:48around the charcoal ovens.

18:49The recipe for what

18:50we know today

18:51under the name

18:52Play-Doh

18:53was therefore

18:54invented.

18:55It was made

18:56only in white

18:57and was supposed

18:58to clean the charcoal oven

18:59by being rolled

19:00back and forth

19:01on the dirt.

19:02It was only later,

19:03in the 1940s,

19:04that new products

19:05intended to clean

19:06the charcoal oven

19:07were born

19:08and that Play-Doh

19:09was redirected

19:10to another

19:11sector of the market.

19:12Although I still

19:13enjoy eating

19:14a good piece of

19:15grilled bread

19:16for breakfast,

19:17isn't it boring

19:18to have to

19:19clean the charcoal oven?

19:20Well,

19:21not anymore

19:22because I recently

19:23discovered that

19:24charcoal ovens

19:25have a slide

19:26or a panel

19:27that can hold

19:28all these

19:29annoying crumbs.

19:30It was a time

19:31when video games

19:32could only be used

19:33by inserting cartridges

19:34into the console

19:35of your choice.

19:36However,

19:37these small objects

19:38gave many

19:39headaches

19:40to many doctors.

19:41People,

19:42especially the youngest,

19:43began to end up

19:44in the hospital

19:45after swallowing

19:46small game cartridges.

19:47Nintendo,

19:48the company

19:49that manufactures

19:50most of these devices,

19:51had to find

19:52a creative solution

19:53to avoid these accidents.

19:54This is why,

19:55nowadays,

19:56Nintendo Switch games

19:57are voluntarily

19:58coated with

19:59special chemicals

20:00that leave

20:01a really unpleasant

20:02bitter taste

20:03in the mouth.

20:04Clearly,

20:05I do not recommend

20:06you to try

20:07and taste for yourself.

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