- 2 hours ago
Unlock the secret to turning ordinary toilet paper into a high-density desiccant with just a quick zap in the microwave. This innovative technique can save water-damaged electronics and revive 'dead' tech, proving to be an incredibly cost-effective solution. Discover how a simple household item can become a million-dollar tool in your DIY arsenal. Get ready to explore fascinating home discoveries that could change your approach to everyday problems!
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00:00Some pieces of clothing come with a small patch of fabric with a button on it.
00:04While it's quite obvious how to use the button, the fabric's purpose isn't so apparent.
00:09It's not there to patch holes. You're supposed to test your cleaning products on it.
00:14Then, if something goes wrong, you won't ruin the whole garment.
00:17The seemingly random dime-sized hole in the elevator door is actually a keyhole.
00:23If the elevator doors get stuck, an operator can open them manually by inserting a special key in this hole.
00:30The same tool is used when an elevator needs routine maintenance.
00:34Some plastic milk containers have dents in their sides that serve several purposes.
00:38For one, if milk spoils, this process can cause swelling and high-pressure buildup inside the container.
00:45That's when the dent comes in handy. It pops out and doesn't let the jug blow up.
00:49Plus, if you decide to freeze the milk, it'll expand like any other liquid.
00:54And then again, the indentation will pop out and prevent the container from bursting inside the freezer.
01:00A first-timer might think that Chinese takeaway boxes have a peculiar shape.
01:05The more experienced diners know that by unfolding the sides of these containers, you get a paper plate with the
01:11food already sitting on top.
01:13The lines on plastic solo cups can help you measure out liquids and non-liquids too.
01:18From the bottom up, those lines coincide with the measurements of 1, 5, and 12 ounces.
01:24The lowermost line is the perfect portion of mouthwash.
01:28The middle one is a serving of cereal for breakfast.
01:30And the topmost is the amount of water recommended to drink 4 to 5 times a day.
01:37Striped toothpaste will always come out in stripes even if you mash the tube with all your strength.
01:42No magic involved though.
01:44The product is very dense and viscous, so it doesn't mix well.
01:48The white, blue, and red parts of the toothpaste are pushed down at an even rate thanks to their similar
01:53physical properties.
01:55And viscosity helps the stuff be pushed down and out from the edges first, so no matter how hard you
02:01try, there will always be those perfect stripes.
02:04Not every iPhone owner pays attention to an almost unnoticeable little hole between the camera and the flash.
02:11It's the gadget's second microphone.
02:14Its role is to block outside noises when you're filming a video.
02:17This microphone also makes the sound clearer.
02:20Use it when you're on the phone in a noisy place.
02:23Dental floss can slip out from your fingers and tangle.
02:26To avoid such problems, tear off a piece and floss and tie its two ends together.
02:31It will be much easier to use and won't hurt your hands.
02:35Most frying pans have holes in their handles.
02:38You can use it to hang the thing on a hook on the wall, but that's not its original purpose.
02:42When you're cooking something in the pan, the hole in the handle is there to hold your messy spoon.
02:47It's especially important for plastic utensils because you can't leave them in the pan for long since they can melt.
02:55Some toothpicks have several grooves on the blunt end.
02:58When you need to use one, break off the grooved end and put it on the table.
03:02It'll serve as a rest to keep your toothpick from touching the surface.
03:06You've probably noticed that most soft-rink lids have ridges and three bumps on them.
03:12With their help, the lid can turn into a coaster once you put it on the table and place the
03:16cup on top of it.
03:17No more spillage!
03:19Bath foam isn't only for fun or a nice smell.
03:22It also helps regulate the temperature.
03:25The bubbles keep the water hot so you can enjoy a bath a bit longer.
03:30Anyway, it works for acrylic bathtubs only.
03:32Those made of metal lose heat really fast either way.
03:36Almost all measuring tapes have a metal tip with a small slot on the end.
03:40You can use this slot to hang the tape on a nail or a screw to make measurements without anyone's
03:46help.
03:46Sometimes this tip has a row of sharp points along the edge on one side.
03:50That comes in handy when you want to leave a mark without using a pencil.
03:56A pack of cotton pads has those strings on it so we could hang it on some hook or holder.
04:01And no, there's no need to untighten and tighten the pack again.
04:05Look at the bottom of the pack.
04:07It has a perforated line.
04:09Tear along that and now you're good to pull out a cotton pad.
04:13A triple handle on a jerry can is there to make it easier for two people to carry it and
04:17distribute the fuel evenly.
04:19Gas cans often have a second hole that actually needs to be uncapped too before you pour the gas.
04:25The air passage will prevent it from pouring out.
04:28Lemons get juicier if you warm them up a little bit in the microwave.
04:32The heat softens the frozen membranes so the juice can flow out freely.
04:36More lemonade for you!
04:37When you buy some grated cheese, get ready for a surprise.
04:41If the package says it contains cellulose, it means that the cheese does contain wood pulp.
04:47Don't worry, it's digestible.
04:49It's added to prevent the product from clumping.
04:53The expiration date on mineral water isn't about water going bad.
04:57Actually, no water can spoil, but the bottle can.
05:01Over time, it starts leaking some chemicals that aren't quite safe.
05:05The spike in the cap of a tube of ointment or cream is there so you can puncture the tiny
05:10foil seal.
05:11No need to grab a toothpick or try to use your fingernails to peel it off.
05:16Post-it notes are supposed to be peeled off from the side like you're turning the page in a book.
05:21Most of us tear them from the bottom, and that just creates a crease and makes the whole note less
05:26sticky.
05:27To prevent water from boiling over, just lay a wooden spoon across the rim of the pot.
05:32It only works for a little while, though.
05:34If the spoon's surface gets heated up to the boiling point, the bubbles will just foam up and around it.
05:40That's why metal spoons won't do.
05:41They heat up too quickly.
05:44Some erasers have two colors and textures.
05:47Not for pen ink versus pencil lead, but for different types of paper.
05:50However, you're supposed to use the blue side to remove pencil marks from heavy grades of paper.
05:57Most people use bobby pins upside down.
05:59The zigzagged part goes closer to your scalp.
06:02The texture keeps the hair and pin in place much better.
06:06And give your pins a spritz of hairspray before putting them in.
06:09They'll grip better.
06:11Ever notice the tiny second hole in the lid of your coffee travel mug or to-go cup?
06:16It's there to control how smoothly the liquid flows out from the drink hole.
06:19Without it, the hot stuff would just glug out at you like milk from a jug.
06:24It also lets the steam escape so the high temperature and built-up pressure don't melt the lid or send
06:29it shooting off.
06:31Apples you buy at the supermarket were likely picked between August and November.
06:36After that, they were covered in wax, hot air dried, and stored in cool places.
06:41It takes the fruit 6 to 12 months to make it to fresh produce shelves.
06:46Sometimes, you need to get away from your computer but don't want to keep logging back in.
06:51Put your mouse over the top of an analog watch.
06:54The mouse will perceive the ticking second-hands movement, and this will prevent your computer screen from turning black.
07:01When using a blender, pour the liquids in it first.
07:04Only after adding your milk, coconut water, or yogurt, put the berries, fruit, or spinach inside.
07:11Thanks to the holes in the bottoms of earphones, air can circulate up and down through the speakers.
07:16It results in increased low frequencies.
07:18This makes the bass sound deeper and improves the overall sound quality.
07:24You can use metal loops on the sides of a grocery cart to organize the space in your cart better.
07:29Hang your jacket on such a loop or put a bag of delicate items there, like eggs or bread.
07:34This way your jacket won't get wrinkled and eggs won't get squished.
07:39The black lines on a basketball make the game easier to play.
07:43They're actually grooves, helping you handle the ball.
07:46And since the players need to move around the court while dribbling or bouncing the ball, control is crucial.
07:53The black lines allow you to grip the ball better.
07:56You can also easily steer it in any direction once it's in your hand.
08:01If the basketball was smooth, you wouldn't be able to do it.
08:04By the way, pebbled dots that cover the outside of the ball serve the same purpose.
08:09The drawer at the bottom of your stove is there to keep your dishes warm when you cook large amounts
08:14of food.
08:15When one dish is in the oven, the already prepared ones are kept warm in the drawer below.
08:21Okay, today I'll show you things you've never seen and tell you stuff you never knew.
08:27Wow, all in one video! What a bargain!
08:30For example, these soda found stations in fast food restaurants.
08:34We all see the nice side of it, but have you ever wondered where all this soda comes from?
08:38Let me take you behind the scenes.
08:41Ta-da!
08:42Turns out it's a pile of boxes with tubes.
08:45So when the drink runs out, the employees change the box and plug the tube back in.
08:50Okay, let's peek into a couple more places where we normally don't belong.
08:55This is, for example, what you will see if you cut the screen of a Mac open.
09:00And here's what's hidden behind the dryers in a public laundromat.
09:04Today, 4 out of 5 households in the U.S. have a dryer.
09:08But they weren't so widely accessible when they first appeared in the 1950s,
09:12because they were way too expensive for the average homeowner.
09:16Now, grocery shopping isn't an uncommon practice,
09:19and we all have walked past dairy fridges a million times.
09:22But have you ever wondered what's behind them?
09:25Turns out they're just shelves, and store employees stack the products from the other side.
09:30It makes perfect sense, but I never imagined it like this.
09:34Now, this photo shows what's behind the elevator button.
09:38Obviously, a bunch of cords.
09:39The buttons are all wired to a computer that manages the elevator.
09:43How does the computer know where the elevator is at a particular time?
09:47Well, there are several possible systems.
09:50But the most common one is a long vertical tape in the shaft with a series of holes.
09:55A sensor counts the number of holes that are passed, and that's how the location is determined.
10:01Okay, there are a couple of common things we all know, but the purpose of which remains a mystery to
10:07most.
10:08So, let me share these secrets with you.
10:10Those metal rivets on jeans have been there from the very beginning.
10:15Jacob Davis, the iconic man who made the first pair of jeans,
10:19added copper rivets to places where pants are most likely to rip.
10:23Today, they have more of a decorative and distinctive purpose,
10:26since they are a traditional attribute of the jeans everyone knows of.
10:30Now, I'll bet you know there are extra loops on some shoes.
10:34No, they're not for sweat or ventilation.
10:37Those are extra loops for laces, just like other loops you use.
10:41But they're there to tie your shoe around the ankle to prevent your foot from moving aside.
10:46That's especially helpful if you're hiking and ascending and descending hills and trails.
10:51Now, have you ever noticed those half-belt thingies many coats and jackets have at the back?
10:57Turns out, they first appeared on oversized military jackets.
11:01So, the extra fabric could be collected on the back, and the person doesn't stumble when working.
11:06Today, those belts are only added for the sake of style and tradition.
11:10Most clothing items you buy come with a small bag of fabric or a button, or both.
11:16These are actually not useless.
11:18Buttons, obviously, can be replaced if you lost the original one.
11:22Pieces of fabric can serve two purposes.
11:24You can patch up the hole, but the main purpose is to provide you with a sample of cloth,
11:29so you can use it to test different washing products on it and see what happens to the fabric.
11:35Now, pom-poms on woolen hats.
11:38Did you know that sailors were wearing hats with pom-poms in the 18th century to protect their heads in
11:44case they accidentally whacked them?
11:46Regular people were wearing them in Scotland, and the color of the pom-pom signified the person's social status.
11:53People got back to wearing hats with those cute decorative items during the Great Depression.
11:57They're made of spare yarn, so it was a cheap way to decorate your hat.
12:01Now, if you haven't noticed, some sidewalks have little plates with bumps on them.
12:07Most people don't pay much attention to them, but they're very important for visually impaired people.
12:12It signals a slope that then leads to a crosswalk.
12:16Also, several patterns signal different things.
12:19Have you noticed that the icon of a gas tank on car dashboards has a little arrow next to it?
12:25Well, the arrow has a purpose.
12:27It points at the side of the car where the gas tank is located.
12:31Very useful for forgetful people, like me, who constantly wonder which side it is on,
12:37and also for those who drive rentals once in a while.
12:40The answer is right in front of your eyes.
12:42If you can't find the arrow on your panel, then the fuel hose on the icon indicates the side instead.
12:49Now, on the back of many makeup and hygiene products,
12:52you'll find this symbol with a marking like 6M, 12M, and 24M.
12:57This is the number of months this product can serve you before you should toss it out.
13:02You might know that whistles work perfectly fine even if they don't have that ball inside.
13:08And yet, they have it.
13:09But why?
13:10Even though there's a sound without the ball, the noise it creates is very flat, and it's not distinguishable enough.
13:17When the whistle has a ball inside, then it starts moving with every blow,
13:22indicating different pitches and making the noise more noticeable.
13:26Lollipop sticks have those squared holes on the end of their sticks for a reason, too.
13:31When the candy is put on the stick, some of it goes into the hole, fixating the candy part.
13:37This way, the candy ball or whatever shape is less likely to fall off the stick.
13:42Yeah, it's a bummer when that happens.
13:44Measuring tapes have that little metal stud on the end.
13:48Most people know that you can use it to stick it to the side of the surface you're measuring.
13:52But it's not the only cool thing about it.
13:55Look, there's also a small slot.
13:57And this slot can be used to hang it on a nail.
14:00Again, to free your hands and keep measuring.
14:02The bottom of the end of the tape has a ridged edge.
14:06It'll help you make a mark if you don't have a marking tool with you.
14:10Have you ever wondered why the tape's blade is curved?
14:13Well, it helps to keep it rigid when extended.
14:17Pay a closer look at the blade.
14:19Apart from numbers and markings, there are also black diamonds.
14:23Those are there every 12.2 inches,
14:26and they're useful for construction workers to space engineering joists.
14:30They can also be useful for you.
14:32If you want to hang something heavy, for example.
14:35The diamond will mark the exact center of a stud,
14:38which is placed 16 inches apart from one another.
14:41And you can drill something to that center to make sure whatever you hang is safely attached.
14:47Now, most coins have ridges.
14:50And this is the legacy of the olden days.
14:52You see, back in the day, all coins were linked to a silver standard.
14:56The amount of silver used in the coin was proportionate to the value of the coin.
15:01So, the more actual silver was used to make the coin, the higher its value was.
15:06Hi-ho silver!
15:08Do you remember the Lone Ranger?
15:09Silver was the name of his horse.
15:12Eh, never mind.
15:13Anyway, all the coins had precious metal in them,
15:16and some people started shaving off a little bit of silver from it.
15:20It wasn't noticeable on one, but if done on several, people could get quite a bit of that precious metal.
15:27So, to prevent fraud, the edges were made with ridges for security reasons.
15:32So, if someone attempted to shave it off, the ridges would disappear, and no one would accept that coin anymore.
15:38Smart!
15:39Today, no one makes coins out of silver.
15:42The coins just represent the value.
15:44But the ridges are kind of a cultural heritage now.
15:47And finally, a typical plastic milk jug often has inverted circles on one or more of the sides.
15:54Not like alien crop circles.
15:56This dimple is there to make the jug more resistant,
15:59and to prevent it from erupting in case the jug falls on the floor.
16:03The dimple gives some more space for the liquid to expand.
16:06Also, as the expiration date approaches, the microbes in the milk start to expel some gases.
16:12As there are more of them trapped inside, the pressure in the jug is rising.
16:17The dimple takes care of the expansion and prevents the jug from exploding.
16:21And the cows are utterly delighted that their hard work is not wasted.
16:26Me!
16:30Okay, I know it's kind of cold to the touch, especially on a freezing winter's day.
16:34But did you know that brass doorknobs actually serve a purpose apart from looking classy and shiny?
16:39Since it's a copper alloy, brass has antimicrobial properties.
16:43That means it can help get rid of harmful germs and bacteria, sometimes in up to two hours.
16:49In high-traffic areas, that's all the more useful.
16:51But since brass is much costlier than other metals like nickel and steel,
16:55you barely see these types of doorknobs anymore nowadays.
16:59Speaking of lovely multi-purpose items, most screwdrivers have a tiny little secret of their own.
17:04They can sometimes be slid through a wrench so that they can be used to create more torque when twisting.
17:10Not to mention the uses when it comes to bolts in hard-to-reach places.
17:15There's a reason why buttons on women's shirts are for the left-handed, and it has nothing to do with
17:20fashion.
17:20This practice dates back to the times when chambermaids were helping ladies dress themselves,
17:25and it was easier for them to perform their job with this orientation.
17:30Having the buttons placed as such indicated a sign of wealth,
17:34so it's easy to imagine why the practice carried on, even though most people dress themselves nowadays.
17:40Next time you receive a package in your mail, take a look at your box cutter.
17:44If it features some diagonal lines on the blade, you're in for a little design perk.
17:48Turns out that these are blades that snap off.
17:52Continuously cutting cardboard can dull the sharp edge of the blade.
17:55To help prevent the need to buy a brand new box cutter,
17:58the top segment along the next line can be broken off to reach a new sharp edge.
18:03To do this, check out the small hole at the base of the tool, sometimes called the blade snapper.
18:09The people that first came up with this brilliant invention were engineers,
18:13inspired by the way chocolate bars are segmented.
18:16Hold on a minute.
18:16Don't throw away the cardboard package just yet.
18:19Most likely, you'll have some silica gel packets somewhere at the bottom of the box.
18:23Since this gel is basically a drying tool, it gathers up the moisture out of its environment,
18:28so you can store these packets for further occasions.
18:31Whether you'll need to dry out your phone or some other electrical object,
18:35you can place them in a container next to the silica gel to reduce the damage.
18:40You don't have to be a mechanic to know when a standard car tire needs replacing,
18:44since they come equipped with a neat indicator.
18:47Take a closer look, and you'll see that treads within the tire are a bunch of rubber notches.
18:52When the treads are evened out with the perpendicular bars,
18:55it's a sign you need to book an appointment with your local car service.
18:59Since most likely, the tires have lost most of their traction and may not be safe for driving any longer.
19:05The upper corners of a car windshield feature textured black dots melted into the glass edges.
19:11This neat add-on isn't there for design purposes.
19:14It's called frit glazing,
19:16which means that a special type of ceramic paint is added to the window for protecting its sealant from UV
19:23rays.
19:24It also conceals and creates a coarser surface for the adhesive used to set the window in place.
19:31Whenever you're up for a drive, check out if there's a small tab under your car's rear-view mirror.
19:37Bet you didn't know it's there to help switch the mirror from daytime to nighttime views.
19:42It uses a prismatic glass technology to blur the reflection and reduce the glare of headlights behind you in traffic.
19:50People came up with these manually tilted mirrors in the 1930s, but they became standard somewhere in the 1970s.
19:57While you're in the car, check out the headrests, as you most likely don't know that they carry a little
20:03disguised purpose.
20:04Of course, they're adjustable to accommodate passengers of any height so that they get the proper support for their heads
20:10and necks.
20:11The hidden feature is that they are detachable and come with two very solid metal bars.
20:17Should you ever find yourself stuck in a car and need to make a fast getaway?
20:21These bars come in handy to crack out the car windows.
20:24So you're out for a drive and you're suddenly out of gas.
20:28What I'm about to describe sounds more like a meme than an actual situation bound to happen.
20:33But what if you're in such a hurry that you accidentally drive off with the gas nozzle still in the
20:38tank?
20:39Well, the nozzles have been designed to prevent any hazards from happening, rest assured.
20:44They feature a breakaway device that will allow the hose to separate when taken out with enough force.
20:51Initially designed in the early 20th century to be worn exclusively by basketball players, sneakers soon became one of those
20:58fashion fundamentals, similar to jeans and leather jackets.
21:01If you take a closer look at them, you'll see they have two extra holes on the side, similar to
21:06the shoelace holes.
21:07They're manufactured as such, not only to provide extra ventilation, but to allow people to get extra creative with their
21:14laces when wearing the shoes.
21:16Admit it, you've always thought that chopsticks are merged at the end for the sole purpose of keeping them together
21:21until you're ready to dig into your meal.
21:23That may or may not be the whole truth.
21:25Under a more detailed inspection, the wooden tools feature a square-shaped end.
21:31Chopsticks manufactured like this date back to an old Japanese traditional design, which can help with breaking the ends easily.
21:38The separated end can then be used as a resting block for the chopsticks to keep it more sanitized in
21:44hopes it can be used again, since they won't be touching the table or any other surface.
21:50Women's bikes have a special design, which, surprisingly, has a historical and fashionable purpose.
21:56The lower frame is for the most part meant to make up for the generally shorter height of ladies, compared
22:01to that of the average gentleman.
22:03While that is the case for handlebars and saddles, the overall frame is lower for an additional purpose.
22:09Way back when women wore long skirts and dresses all day, every day they needed to make sure their outfits
22:15wouldn't get caught in the frame.
22:17That's how we came up with a lower-framed bicycle, perfectly made for women and their needs at the time.
22:24The fact that toothpastes are multicolored is not just a nice perk to make dental hygiene more fun.
22:30There's a secret meaning related to each of the colors, which dates back to the 1970s.
22:35In those days, people grew more and more interested in their oral health care.
22:40And as such, they were looking for products which could do more than merely clean their teeth.
22:46One company was the pioneer in that regard, adding mouthwash to its toothpaste, meaning the blue strip.
22:52They later added on the red strip, meant to feature ingredients which helped with gum care.
22:58Speaking of toothpaste, check the cap next time you open a new tube.
23:01You may be in for a little surprise.
23:03There's a pointed cone shape inside the cap, so you can puncture the seal of the toothpaste without cutting yourself
23:10or ruining your manicure.
23:11Not to mention, it's more hygienic since you won't be able to transfer germs or other bacteria into the product
23:17itself.
23:19On the subject of bathroom countertop items, toothbrushes come with a neat add-on hidden in the bristle patterns.
23:25Apart from making the toothbrush look cooler, they also do come with a practical purpose.
23:31Most toothbrushes come with a pattern of blue bristles intertwined with white ones.
23:35The blue dye is meant to fade out, signaling the time when you need to replace your toothbrush.
23:41Dentists say that toothbrushes should be replaced every three to four months, but it does serve as a great reminder
23:47in case you forget.
23:48Still love playing with LEGO?
23:50Don't judge. Hey, it's a great hobby for all ages.
23:54Notice there's a hole on top of the LEGO heads?
23:56Behold, you're looking at a safety feature that the people at LEGO designed to prevent choking hazards.
24:03The most dangerous issue should a person swallow any of these pieces is the blocking of the airways.
24:09Designing a hole inside the LEGO head helps the air to flow freely through the piece until it can be
24:14removed safely.
24:16We're now used to all sorts of modern light bulbs, some tubular, some shaped like diamonds, and some even twisted
24:23all together.
24:24Historically, light bulbs were round and the initial shape served a purpose in itself.
24:29It was mainly connected to the fact that glass bulbs were hand-blown, which gave them the round shape to
24:35begin with.
24:36The hidden practical reason was that the light bulb filament needed to be at the same distance from every surface
24:41of the glass sphere.
24:42The easiest way to achieve this was to make the glass in the shape of a globe.
24:50What's hiding inside Coca-Cola cans and regular household batteries?
24:54Why do magnets affect breakfast cereals?
24:58Do crosswalk buttons actually work or are they just useless decorations?
25:03What does that USB symbol really mean?
25:07I'm not sure I know the answers to these and similar questions, but I'm eager to learn the truth together
25:13with you.
25:14Let's find it out.
25:15Coca-Cola cans have a secret few people know about.
25:20Here's a Coke can.
25:21Let's submerge it in a highly corrosive alkaline solution.
25:25The aluminum dissolves due to a process known as hydrolysis, and we can see a plastic liner inside the can.
25:31It's made from a polymer or epoxy resin, and serves as some kind of a protective barrier between the aluminum
25:38walls of the can and the rather acidic soda.
25:42Despite a popular myth, household batteries don't actually contain liquid, and if you accidentally cut them open, no toxic liquid
25:50will spill.
25:51Most of them are dry cell batteries, which are made of electrochemical cells.
25:55Those convert chemical energy into electrical energy.
25:59Larger batteries often house numerous small cells within them, too.
26:04Even Tesla vehicle batteries consist of multiple small cells.
26:07When combined, they easily provide the necessary voltage.
26:13Most toothbrushes have differently colored bristles, but they aren't just pleasing to the eye.
26:18Those bristles, often blue, have a functional purpose.
26:22They're called toothbrush indicators, and their colors fade as you use the brush.
26:26The American Dental Association recommends changing your toothbrush at least four times a year.
26:32And by getting paler, these bristles help you figure out when it's time to replace your toothbrush.
26:38You'll probably agree that there's no better snack than a pack of chips.
26:42Some are flat, others have ridges.
26:44Is it just aesthetics?
26:47Not really.
26:47The main purpose of those lines on some kinds of chips is to help with the distribution of spices and
26:53seasonings.
26:54In other words, all those substances that make your chips taste like cheese are mostly stored inside the lines.
27:00Plus, the lines make chips crunchier.
27:04Now, this one might be a surprise, but some breakfast cereals are magnetic.
27:09That's because they're often fortified with iron in the form of a fine powder.
27:14Due to the added iron, cereal flakes get attracted to magnets.
27:17All this may sound kind of alarming, but in reality, the iron content in the flakes is minimal and doesn't
27:23pose any threat to your health.
27:26That clear fluid in gel pens is called the ink follower or stopper fluid.
27:31The gel in such pens contains pigment particles dissolved in a polymer solution.
27:36The main task of the stopper fluid is to be a barrier to prevent the gel from evaporating or leaking
27:41out.
27:42Without this transparent fluid, your gel pen wouldn't function.
27:47The fluid always stays in one position and doesn't get dissolved with the gel.
27:51Neither does it move backwards or flow out of the pen.
27:56Many pedestrian crosswalk buttons, namely in New York, are placebo buttons.
28:01They do literally nothing when you press them.
28:05Originally, they were functional after being introduced in 1964, but today, most of them don't affect traffic lights,
28:11which are programmed based on the real needs of the traffic flow.
28:15Why do such buttons even exist, then?
28:18It's a simple psychological trick, providing you with an illusion of control.
28:23You might have noticed that movie theater seats are almost always red.
28:28This choice isn't random.
28:30It has strategic importance, which is rooted in visual science.
28:34The thing is, red light has a longer wavelength.
28:37It means that it's the first color to disappear in low light.
28:40It allows the audience to concentrate better on the screen once the movie begins.
28:44Such a design choice enhances the viewing experience by minimizing distractions.
28:50Speed bumps are crucial for pedestrian safety.
28:53But at the same time, they can seriously increase car emissions due to the non-stop acceleration and deceleration they
29:00cause.
29:02To address this issue, some cities, like London, are testing fake speed bumps.
29:07Those are optical illusions painted on the road.
29:10They look raised from a driver's perspective, but in reality, they're flat.
29:15Authorities hope that this approach will slow down drivers without having a negative impact on the environment.
29:22Soda bottles are always filled in such a way that there's some space between the liquid and the cap.
29:28That's because soda contains carbon dioxide.
29:30It's a gas that can expand once the bottle's heated.
29:34If there's no gap in the bottle, it can break because of the pressure building inside.
29:39Also, when you open your drink, the gases go out in the form of bubbles, making the drink overflow.
29:44The gap helps with this problem, too.
29:49The USB symbol, looking like a trident, has always sparked multiple speculations about its origin.
29:57One popular idea is that it represents Neptune's trident and symbolizes power and adaptability.
30:02But there's also a little bit less exciting theory.
30:06A man who claimed to have designed the symbol in the 1980s stated that it was supposed to represent connectivity.
30:13The large circle symbolizes a computer, while the attached shapes, the circle, the triangle, and square, stand for different outputs.
30:23The design of a tennis racket has a specific feature known as the throat.
30:27It's an open space below the head of the racket.
30:31This space isn't just for storing balls, it also improves the racket's aerodynamics by letting air pass through.
30:37It seriously reduces drag during swings.
30:42Speaking of tennis, tennis courts are usually built with a north-south orientation.
30:47It helps minimize the impact of the sun's position during the game,
30:51ensuring that neither player has the sun directly in their eyes.
30:55Look closely at a tram's overhead lines, and you'll see that its contact wires zigzag back and forth instead of
31:02going in a straight line.
31:04That's because all trams have pantographs attached to their roofs.
31:09The upper part of the pantograph is gradually worn down by the overhead wire and eventually needs to be replaced.
31:15To wear it down evenly, the wire is not installed strictly along the tram's path, but in zigzag patterns.
31:23As the tram moves, the pantograph slides along the wire, and it wears down evenly.
31:30Those cone-shaped water cooler cups?
31:33Their shape is intentionally designed to prevent users from setting the cups down.
31:38This allows employees to minimize the risk of spilling water on their desks around various electronic devices.
31:44Plus, less material is used to produce cone-shaped cups, which makes the process less wasteful and more cost-effective.
31:52It also kind of supports sustainability by encouraging people to drink their water quickly and dispose of their cups immediately
31:58after.
32:01Most suitcases have two zipper pulls, and it serves several purposes.
32:06First of all, if one zipper fails, the other can keep the suitcase closed.
32:11Even better, having two zippers allows you to have easier access to small sections of your suitcase without having to
32:18open it entirely.
32:20And finally, when you have two zippers, you can connect them with a padlock for increased security.
32:28Some plastic milk containers have dents on their sides.
32:32These dents serve several purposes.
32:34When milk spoils, it usually causes swelling and high-pressure buildup inside the container.
32:39That's when the dent pops out and doesn't let the jug blow up.
32:43Plus, if you decide to freeze the milk, it will expand like any other fluid.
32:48And then again, the indentation will pop out and prevent the container from breaking inside your freezer.
32:56If you ever had a problem figuring out why fake pockets exist, you need to hear this.
33:02The main reason is that if a clothing item has a specific cut or shape, pockets may spoil it.
33:08They can alter the item's shape either in the warehouse or already on the retail rack.
33:14The solution?
33:15Getting rid of the pockets in key areas.
33:18Plus, fake pockets are obviously cheaper, and they don't get stretched out.
33:24The thermos wasn't actually invented to keep your coffee warm.
33:28It was made by a Scottish scientist who wanted a safe place to keep his chemicals at a stable temperature.
33:35So, he took two bottles, put the smaller one inside the bigger bottle, and vacuumed out the air between them.
33:45Many shirts have two buttons on the cuffs, but only one buttonhole.
33:49So, what is the second button for?
33:52Turns out you can use it whenever you're wearing a watch, so the cuff is looser.
33:58Most clothing items you buy come with a small bag of fabric or a button, or both.
34:04Buttons obviously can be used as a replacement if you lose the original ones.
34:09Pieces of fabric can be used to patch up a hole, but most importantly, it's a tester.
34:14You can use it to test different washing products on it and see what happens to the fabric.
34:21Some umbrellas have a tip at the top, and it turns out it's not just a pretty design.
34:27When going inside on a rainy day, you should just close your umbrella and tap the tip against the floor
34:33to drain the water faster and more effectively.
34:37Many backpacks have this diamond with two parallel cutout slits on its front, and it's there for your comfort.
34:44You can attach something to it, like a water bottle or shoes.
34:48It comes especially handy if you travel somewhere or go hiking, so you don't have to hold your stuff.
34:56Okay, the next thing is gear loops, and probably from the name of it, you already have an idea what
35:02they're there for.
35:02You can strap in some useful gear you need to have with you, like trekking poles or shovels.
35:08Some gear will need to be secured to do it.
35:11Drop the handle through the loop and rotate it upward.
35:14Then, secure it with the elastic hook at the top, and you're golden.
35:20On the back of many makeup and hygiene products, you can find this symbol with a marking, like 6M, 12M,
35:28and 24M.
35:29This is the number of months this product can serve after you open it and before you should throw it
35:36out.
35:37The two sides of a cotton pad are different because each of them has a particular purpose.
35:43A cotton pad has several layers to ensure that it's soft, strong, and can absorb liquids.
35:49The edge is stitched to hold it all together.
35:53The smooth side of a pad is for applying products, like tonics and lotions.
35:58And the embossed side is best for cleansing and makeup removal.
36:03Also, any pack of cotton pads has those strings on the sides.
36:07They're there so you can hang the package somewhere.
36:10Then, you can open the package at the bottom, where the perforated line is, and take them out.
36:17Did you know that there is an efficient way to pull a thread from yarn?
36:21When you pull from the outside, the yarn rolls away, so you need to hold it.
36:26However, if you pull it from the center, it will stay together.
36:31We're all familiar with staplers, but I bet you don't know all its secrets.
36:36Most staplers have a compartment to store spare staples, which can be located either on top or at the bottom.
36:44Also, surprise! This metal plate you press staples against can be turned around.
36:49This way, the device will be able to staple your documents by turning the metal ends outwards.
36:56No need to wonder whether you need to get a smaller or bigger container.
37:00Turns out, plastic food containers have volume measurements on their bottoms, indicating how much food they can fit.
37:08Ceiling fans come with a small switch on the inside of the blade.
37:12You might not have noticed it because it's not in plain sight, so check yours out.
37:17This switch allows you to change the direction of rotation.
37:21Now, why would you want to do that?
37:23The blades of a fan push the air in different directions, depending on the way they rotate.
37:28In the summer, you need the air to be pushed down to create the effect of a breeze.
37:35In the winter, the direction should be changed so that the air is pushed towards the ceiling.
37:40It then heats up before going down the walls.
37:45Have you noticed that the gas tank sign on cars' dashboards has a little arrow next to it?
37:51Well, this arrow has a purpose.
37:54It points at the side of the car where the gas tank is located.
37:57It's very useful for forgetful people who constantly wonder where their gas tank is and also for those who drive
38:04rentals once in a while.
38:05The answer is right in front of your eyes.
38:08If you can't find the arrow on your panel, then the fuel hose on the icon indicates the side instead.
38:17All car tires have 12-digit numbers printed on them, and they're actually important codes for car owners if they
38:23want to get the right tire.
38:25The first letter identifies the type of tire.
38:29P stands for a tire for light passenger cars, and LT is for heavy vehicles.
38:35Then, the following numbers stand for the width of the tire, its radial, and its diameter.
38:43Measuring tapes have that metal stud on the end, which you can use to attach the tape to the surface
38:48you measure.
38:49This way, you don't need to hold it yourself.
38:52But there's also a small slot, which can be used to hang the tape on a nail, again to free
38:58your hands and keep measuring.
39:00The bottom of the end of the tape has a ridged edge.
39:04It will help you make a mark if you don't have a marking tool with you.
39:09On the tape, there are black diamonds that are placed every 19.2 inches.
39:15They're useful for construction workers when spacing engineering joists.
39:19They can also be useful for you if you want to hang something heavy, for example.
39:24The diamond will mark the exact center of a wooden joist.
39:28Those are placed 16 inches apart from one another.
39:32There, you can drill something to that center to make sure whatever you hang is safely attached to the joist,
39:38instead of the unreliable, thin wall.
39:41Pictures will survive, but it's particularly important if you're hanging something heavy.
39:47Did you know that batteries have an expiration date?
39:51Yes, it's printed right on their label, but I've never noticed it before.
39:56The expiration date doesn't mean you can't use it after that.
40:00It's more like a recommended usage period, after which the manufacturer can't guarantee full battery life.
40:08Due to deteriorated components.
40:12These little feet keyboards have are actually a standard.
40:16The height of a keyboard should be adjustable, allowing the angle between 0 degrees and 15 degrees.
40:24The reason to fold the feet out is for you to see the keys better, in case you don't type
40:31blindly.
40:32A little problem that comes with it is that, in this case, your wrists are bent.
40:37And it's not good to keep them in this position for a long time.
40:43Pans have those holes on the ends of their handles.
40:46They're not just there for you to hang them.
40:49You can also place your cooking spoon in there.
40:52It'll hang right above the pan, and the sauce will not spill around.
40:57Make sure to tap off the sauce or food beforehand, though, so that it doesn't go down the spoon's handle.
41:06Stickers with numbers you can find on fruits can tell you some information on how the food was grown.
41:14A four-digit code that starts with a four means that the fruit was grown conventionally, meaning it contains chemicals
41:23and pesticides.
41:24So your best choice should be a fruit with a five-digit number.
41:28And if you see the number nine, it indicates that the fruit is certified organic.
41:36On the bottom of plastic bottles, you can often notice a mark of a triangle with a number engraved in
41:43the middle.
41:44This number specifies the type of plastic that was used to produce the bottle.
41:51These codes help people and local recycling centers to sort returns.
41:56Products that were made of plastic of types one and two are the easiest ones to recycle.
42:04Plastics of types three through seven are tougher to recycle.
42:10Leaving your valuables or a chocolate bar in a car is a no-brainer.
42:15But there are other things people often overlook.
42:18Here's what to watch out for before leaving your car.
42:22Number one is aerosol cans, hairspray, deodorant, spray paint, household cleaner and that sort.
42:29On the back of these cans, you might notice a storage temperature recommendation.
42:33Well, stick to that.
42:35Here's what can happen.
42:37Since these cans are pressurized, they become more sensitive to temperature.
42:41What's inside the aerosol may expand and this may result in a crack.
42:45And then, the can can blow up.
42:48Temperatures above 100 degrees Fahrenheit are already alarming.
42:52And it can easily get as hot as that in your car on a warm summer day.
42:57Researchers from the USA have figured out how long it takes a car to turn into a sweat factory on
43:03a hot day.
43:07Within one hour, the insides of the car parked in the sun reaches 95 degrees Fahrenheit or hotter with an
43:14average temperature of 116 degrees Fahrenheit.
43:18So, if you want your car in one piece and running, take aerosol cans with you.
43:24The second item is sunscreen.
43:28Sunscreen is vital for your skin since it decreases the risk of skin complications and prevents skin aging caused by
43:35the sun.
43:36This includes wrinkles, sagging and age spots.
43:40But when you leave sunscreen in your car, it gets exposed to high temperatures and it can ultimately shorten its
43:46shelf life.
43:47If you end up finding spoiled sunscreen, you might notice a funny smell when you open the cap.
43:53Plus, the heat might cause the cap to open and the sticky substance will get all over the car.
43:59The same rule applies to lipsticks and other cosmetics as well.
44:04The next one is plastic bottles.
44:07There are two reasons why you shouldn't leave them inside your car.
44:11Firstly, a plastic water bottle can act as a lens, magnifying the sun's rays and starting a fire.
44:18A fire department in Oklahoma conducted an experiment and confirmed that the danger of fire was real.
44:25David Richardson from that department says it can happen if the beam of light is focused enough.
44:31The second reason is related to your health.
44:34Many plastic bottles contained by sphenol, a potentially toxic compound, the BPA levels can increase at high temperatures and that
44:43can be harmful to your body.
44:44There's a chance that this chemical can get into your drink after you leave the bottle inside the vehicle.
44:51Oh, and batteries!
44:53They could lose their capacity to work at full power when they're left abandoned in the car.
44:57You can buy a new pair and fix this problem, but it won't be as easy to solve the problem
45:03of leakage or a rupture.
45:05It can be bad for your health because battery acid is dangerous when inhaled and highly corrosive.
45:11The reason for leakage is again related to high temperatures.
45:16Battery manufacturers recommend keeping their products at room temperature.
45:21This fact is partially related to batteries.
45:24It's about electronics.
45:25Have you ever realized how hot your phone can get when it's exposed to the sun?
45:30You're driving and, let's say, looking at the GPS on your phone.
45:34Even in this situation, your phone can heat up.
45:38What will happen to it after hours of sun exposure?
45:41Phone companies are strongly against customers leaving their devices in vehicles because they might shut down, get damaged, or, you
45:49know, boom!
45:52Personal belongings are another priority on the list.
45:55A wallet or a handbag may come to one's mind first.
45:59Yet, a passport or even some change you leave near the passenger seat is sometimes enough to attract a thief.
46:05Better to keep such stuff out of sight, for example, by storing it in the trunk instead of leaving it
46:11in the back seat.
46:14Number 7 is also related to theft.
46:17Life can be too hectic sometimes.
46:19And it's understandable if you can't clean your car frequently.
46:23But leaving garbage in the car is another mistake.
46:26Thieves tend to search for messy-looking cars.
46:28They think that the owner doesn't use such a vehicle frequently.
46:37I know it isn't that common to keep plants in the car on a daily basis, but sometimes you need
46:42to move them.
46:43The heat inside the vehicle can easily dehydrate the poor thing.
46:49Medications are another thing you shouldn't keep in the car for too long.
46:52The constantly changing temperatures inside the vehicle can decrease the effectiveness of your pills.
46:59Authorities recommend keeping most medications at 59 to 77 degrees Fahrenheit in a cool and dry place.
47:07Important documents that contain your personal data shouldn't be left in the vehicle either.
47:13Some examples of such documents are tax forms, financial statements, and school transcripts.
47:19A thief could commit fraud or identity theft using this valuable information.
47:25And there's also food and drinks.
47:28Experts recommend not leaving groceries or leftovers in a warm car for more than two hours,
47:33or only an hour when it's over 90 degrees Fahrenheit.
47:37The same rule applies in the winter too.
47:40Canned foods, for example, have a high risk of going bad.
47:44If a can of sweet peas, let's say, gets frozen in the car,
47:48the effect will be similar to what would happen to soda.
47:51Let it thaw in the refrigerator instead of leaving it at room temperature.
47:55If the product doesn't look or smell normal,
47:58throw it away in a place where not even an animal can find it.
48:01Don't try to taste it.
48:03Just trust your senses.
48:05If the item seems rusted or there are some cracks in the can,
48:09it should end up in the trash too.
48:11Eggs are another example.
48:13Normally, eggs shouldn't be frozen.
48:15But let's suppose you forgot one grocery bag in the trunk of the car
48:19and the weather was so cold at night that the eggs got frozen.
48:22Keep the eggs in the refrigerator before use.
48:25They should be hard cooked.
48:26It's your only option.
48:28You see, freezing causes the yolk to become thick and syrup-like.
48:32It loses that natural flow and doesn't mix well with other ingredients.
48:38You shouldn't leave your pets alone in the car, obviously.
48:42And not just because of a potential rise in temperature.
48:45They will feel uncomfortable without you, their best friend accompanying them.
48:50In their frustration, they might do something to get noticed,
48:53which can be, for example, ruining the interior of the vehicle.
48:58Now let's return to the winter season again.
49:01If possible, keep the gas tank of your car over half full.
49:04This can prevent the fuel lines from freezing.
49:07It also makes it easier to start the engine and hit the road in the morning.
49:11While keeping an eye on the fuel bar,
49:13it might be a good idea to glance at the tire pressure too.
49:16The cold can result in tire pressure drops.
49:22Not only high, but also low temperatures can damage some items.
49:26A good example is paint cans.
49:28They should be quickly taken out of the vehicle in the winter.
49:31The ingredients in the paint can experience expansion,
49:35separation, and clumping due to the cold.
49:38In other words, you won't be able to use this paint anymore.
49:42Weather also affects wooden musical instruments like violins or guitars.
49:48Changes in temperature and humidity can cause wooden instruments to warp, crack, or split.
49:55Glasses get affected by fluctuating temperatures too.
49:58In a hot car, plastic frames can bend.
50:01Or plastic can become brittle when it's very cold.
50:05This makes glasses prone to breaking.
50:08Don't leave house keys and garage door openers inside the car.
50:11This is an everyday practice for many people, but it's risky.
50:15They can get into the wrong hands.
50:18To listen to music, most people connect their phones to the car or listen to the radio.
50:24CDs are getting less and less used these days.
50:27But don't leave them in the car anyway.
50:29They might get warped, and you won't be able to use them anymore.
50:33Can you think of any other items you shouldn't leave in the car?
50:37Did you know that you can actually inflate a balloon without using your lungs?
50:43All you need is a plastic bottle, vinegar, baking soda, a funnel, a rubber band, and a balloon, of course.
50:51First, pull some baking soda into the balloon using your funnel.
50:56And now, pour the vinegar into the bottle.
50:59You don't need a lot.
51:01Just fill about a third of the bottle.
51:03Let's go ahead and put the balloon over the bottle.
51:07But don't tip the soda inside the vinegar yet.
51:10Secure the balloon with a rubber band and tip it over to make the soda fall into the vinegar.
51:15And now you can step back and enjoy the show.
51:19When the baking soda and the vinegar are mixed together, they release CO2 that will inflate the balloon.
51:26You can use the inflated balloon to show your friends another trick.
51:30Grab a comb and rub it on the surface of the balloon.
51:33Now you can bend the water flow in your sink with static electricity using your brand new electrified comb.
51:40Now, just don't try brushing your hair.
51:43Can you really pierce a balloon without popping it?
51:46The answer is yes.
51:49You're going to need a skewer or a long needle, a balloon, petroleum jelly, and some courage.
51:55Scratch the balloon with your fingers and make it more flexible.
51:59Now, blow steadily into the balloon.
52:02Stop before blowing it to the full size.
52:04This will make the trick easier to perform.
52:06Put some petroleum jelly on the needle.
52:09Now, find this darker area near the knot where the balloon is less stretched.
52:14And just pierce it all the way through the top, like this.
52:18Balloons are made up of polymer chains.
52:21They're so tiny that they seem invisible to the human eye.
52:24This trick works because the polymer chains are less stretched on the neck of the balloon.
52:29It was enough room to allow the needle in between the chains without breaking them.
52:34But if you try the same technique on the sides of the balloon, it will definitely pop.
52:40By the way, hairspray actually helps keep the air in the balloon longer by sealing the surface.
52:46But if you apply hairspray on the outside of the balloon and then touch it when it's not yet dry,
52:52the balloon will shrivel.
52:53Isn't it magic?
52:57Beware, our next trick can make you question gravity.
53:01Pour some plain water into a glass bottle.
53:04Not much, about a quarter.
53:06Put the bottle in the microwave for a minute.
53:09Meanwhile, prepare a bowl with colored water to make the trick more visual.
53:14Take the bottle out of the microwave, turn it upside down and pour it into the colored water.
53:20The bottle will soon begin to fill with water.
53:23Can you guess why?
53:25The air expands when it's heated.
53:27The bottle and the air began to cool down and the air contracted, which caused the water to move.
53:34Not only wizards can make things disappear.
53:38Fill a plastic container or transparent glass with sunflower oil.
53:43Dip a glass rod inside the oil.
53:46Can you see it now?
53:48Oil and glass bend light the same way because they have almost equal refractive indexes.
53:54Therefore, it's impossible to see how the wand bends light inside the oil.
53:59To make this trick even more epic, pour equal parts of water and oil inside a glass and dip the
54:06glass rod inside it.
54:08You'll see it in the water, but it will disappear inside the oil.
54:13Have you seen this epic instant freezing trick?
54:16Here's how you can repeat it at home.
54:19Grab a small plastic bottle of clean drinking water.
54:22Leave it for about 4 hours to bring it to room temperature.
54:26And now, put it into a freezer and wait for an hour and a half.
54:30After that, take it out very carefully.
54:34Try not to shake it at all.
54:36Now, hit the bottle strongly or shake it and see what happens.
54:41Not only is red cabbage rich in fiber and vitamins, but it's also pretty useful for homemade scientific experiments.
54:49Boil red cabbage in pure water and wait until the water gets colored.
54:54Red cabbage contains a chemical called anthocyanin.
54:58It changes color when it's mixed with an acid or a base.
55:02That's why if you mix your cabbage with water with different ingredients, you'll get different colors.
55:08Bases like soda will make it blue, but acids, on the contrary, will create reddish colors.
55:14You can prove it by adding some lemon juice to your cabbage water.
55:17The water will become pinkish.
55:21And if you add vinegar, you'll get an even more vibrant pink color.
55:26If you have a juicer, you can try the same experiment with red cabbage juice.
55:31Initially, it will have a more vivid purple color.
55:34But, under the influence of additional liquids, the color will change.
55:39Can you guess which color you'll end up with if you mix cabbage juice with bleach?
55:43It's almost transparent, but still has a greenish-yellow tinge.
55:49The next trick is very trendy among artists.
55:52Here's what you're going to need.
55:54Liquid soap, cotton buds, milk, and acrylic paints.
55:58You can use food coloring for this tip.
56:01Pour a little bit of milk into a wide bowl or a plate.
56:04You don't need a lot.
56:06Then, put a few drops of paint into the milk.
56:09And now, dip a cotton bud covered with soap.
56:12The patterns will begin to change.
56:14That's because the fatty molecules in the milk get attracted to the molecules of soap.
56:20When you're satisfied with the pattern, you can put a sheet of paper on top of the milk.
56:25And voila!
56:26Your abstract masterpiece is ready.
56:29In fact, this technique is related to an ancient paper marbling called ebry.
56:35Artists created colorful patterns by sprinkling and brushing color pigments on a pan of oily water
56:40and then transformed those patterns on paper.
56:45Friction helps people walk on the road instead of sliding on it.
56:48And it also allows us to perform this cool experiment called floating rice.
56:55Fill a small plastic bottle with rice.
56:57You can use a funnel to make the task easier.
57:00Shake the rice for a while.
57:02And now, try to push a chopstick or a pencil inside the bottle.
57:06If you did everything right, the stick will get stuck in the rice.
57:10You can also try using different types of grains and see what happens.
57:15Have you ever tried to put an ice cube into oil?
57:18Well, you can try today.
57:20It will create these cute little drops that will fall into the bottom of the glass
57:24because they're heavier than oil.
57:29Here's an easy way to stick an ice cube to a string without any glue.
57:33Place an ice cube in water.
57:35Put a piece of string on top and sprinkle it with salt.
57:39You don't need much, otherwise the ice will dissolve.
57:42A pinch is enough.
57:44Wait for one minute and then gently pull the string.
57:48And there you go.
57:49The ice has stuck to the string.
57:53For this experiment, you're going to need an empty, clean soda can.
57:57Turn on the kettle and wait until it begins to boil.
58:00Carefully hold the can over the kettle using kitchen tongs.
58:05It will help fill it with hot steam.
58:07When the can is full of steam, give it an ice bath.
58:10You can put it into a bowl with cold water and ice cubes.
58:15The can should wrinkle up right away.
58:17That's because the volume inside the can decreases, reducing its pressure and allowing the external pressure to crush the can.
58:26The next trick is also about air pressure.
58:29You're going to need a glass bottle, a small piece of paper, a lighter, and a peeled, boiled egg.
58:35The diameter of the bottleneck should be less than the width of the egg.
58:39And it's important to use glass because plastic can melt.
58:44Now carefully light the paper.
58:47Let it burn a little bit and drop it inside the bottle.
58:50Put the egg on the neck of the bottle.
58:52It should begin to bounce and soon the pressure of air will push the egg into the bottle.
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