- 17 hours ago
Discover the surprising potential of old CDs that experts never talk about! This exploration reveals how a simple disc can transform into an optical tool and survival asset. From boosting Wi-Fi signals to creating homemade spectrometers, learn how to repurpose your old collection into innovative gadgets. Uncover the science behind the unique properties of CDs, making them an essential part of your DIY toolkit. Don't miss out on these clever hacks that turn junk into treasure!
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00:00Road and construction workers are usually dressed in orange because the bright orange hue is visible even in bad weather.
00:07It's the most effective color to attract attention and alert people.
00:10No wonder lots of safety jackets and traffic cones are orange as well.
00:14The stop sign has an eight-sided shape to help drivers recognize it easily, even if they see it from
00:20the back.
00:20And when the signs weren't reflective yet, the octagon shape prevented drivers from confusing the stop sign with any other
00:27at night.
00:28The rumble strips on the side of the road are placed there to alert drivers who doze off behind the
00:33wheel.
00:34When their tires move over these strips, the noise and vibration work like an alarm clock.
00:39There are magnetic locks on fuel hoses at gas stations.
00:43They come in handy if someone drives away with the gas nozzle still attached to their car.
00:48In this case, the lock detaches the hose automatically.
00:51Oh, that's embarrassing.
00:53Gasoline looks like a rainbow in a puddle because it can't mix with water.
00:56It forms a thin membrane over it.
00:59When light reflects from it and the water at the same time, you've got a rainbow.
01:05A triple handle on a jerry can is there to make it easier for two people to carry it and
01:10distribute fuel evenly.
01:12Gas cans often have a second hole that actually needs to be uncapped too before you pour the gas.
01:17The air passage will prevent it from pouring out, so no more fuel waste.
01:22Most gas cans have two holes with caps, a bigger and a smaller one.
01:27You're supposed to uncap the smaller hole before pouring gas inside the bigger one.
01:31It'll prevent the liquid from glugging and spilling all over your clothes and the ground.
01:36Another little thingy we often neglect is a point on an ointment cap.
01:41Most tubes are usually sealed with a plastic film or a foil, and opening it with your fingernails isn't the
01:46best idea.
01:47A point easily opens even the most safely sealed tube.
01:52You can use most screwdrivers together with a wrench to create more torque.
01:57Just place the wrench over the handle of the screwdriver.
02:00This way, you'll need to apply a lot less force than before.
02:04You'll also be able to get to hard-to-reach areas more easily.
02:08They install cameras in shops, banks, and hospitals to monitor everything.
02:13If something happens, you can call the police or rescuers.
02:17The camera really helps to solve a lot of problems.
02:19Why are there no cameras on planes?
02:23The crew keep order on the plane, but they won't be able to do anything if something serious happens.
02:28Besides, there's nowhere to run on the plane.
02:31During the flight, the cameras are useless.
02:34And after the flight, the words of the passengers work ideally instead of cameras.
02:39So, if cameras do no good, then why spend money on them?
02:43Water is great at cleaning stuff because it has triangular molecules.
02:46They're made of one oxygen and two hydrogen atoms.
02:50Um, H2O?
02:51Such molecules have slightly different charges on their opposite sides, pretty much like magnets.
02:57That's why water easily sticks to other molecules, including those that make up dirt.
03:02Lots of private houses have triangular-shaped roofs because this allows rain, snow, and fallen leaves to slide off the
03:08slope.
03:09If all this stuff piled up on top of your house, one day, your roof would collapse.
03:15When a storm is coming, clouds seem to turn dark, but it's just an illusion.
03:20Thin clouds on a sunny day let the light through easily.
03:23They also scatter all the colors of the light spectrum.
03:26This makes us perceive the clouds as white, but the thicker the clouds are and the more water droplets they
03:32contain, the less light they let through and the darker they look.
03:36A good doorknob is the one made of brass, bronze, or some copper alloys.
03:42These metals have an anti-germ effect.
03:45Bacteria spread way slower on them.
03:47They also get rid of germs pretty fast, within a couple of hours.
03:51Nope, it doesn't mean you don't have to wash your hands.
03:55Diamonds have such symmetrical shape to show you their brilliance.
03:58Initially, the gems aren't so beautiful.
04:01They go through several stages of cutting and then become pieces of elegance.
04:06Most of these stones have a round shape with slightly pointed corners.
04:10Diamonds shine the brightest in this shape.
04:14Why are there two holes in the socket?
04:16The left hole is neutral, the right hole is not, and the gap underneath is ground.
04:22Electricity needs to flow through the chain.
04:25The current flows from the hot slot, passes through your phone charger, for example, and then goes through the neutral
04:31hole.
04:32Ever wondered what that small pocket on your jeans is for?
04:35People used to wear watches on chains.
04:37That small pocket was meant for it.
04:40Now, almost no one wears such a watch, but the pocket remains.
04:43You can still keep something small in there, like a ring.
04:47In London, there are some poles that look like street lamps, but there are no bulbs.
04:52Well, their official name is stink pipes, and they're a thing of the past now, but they used to come
04:58in handy back in the 19th century.
05:00These hollow poles would vent away the air and explosive gases with bad smells to prevent, shall we say, unwanted
05:07consequences.
05:09Most kitchen shears have metal, plier-like teeth in the middle.
05:13Between the handle grips, they can help you crack nuts, crab shells, and other tough products.
05:18You can also open jars and bottles or remove herb stems with their help.
05:23Leather often looks dull to the eye because it's covered with itsy-bitsy scratches and scrapes.
05:29They scatter the light that hits the material.
05:31When you coat your shoes in a layer of wax, you fill these tiny crevices.
05:36The surface becomes smoother, and the rays of light bounce off it more evenly.
05:40That's why the leather looks shiny.
05:43Highlighters are filled with a special semi-transparent fluorescent ink that can glow in dim light.
05:50Yellow and light green hues are the most popular because they don't prevent you from seeing the text after black
05:56and white photocopying.
05:58Photocopiers perceive yellow and light green marks as very pale and don't print them.
06:03They make magnets shaped as a horseshoe because this increases the magnetic force.
06:08Colors matter, too.
06:09The blue part indicates the south pole.
06:12The red part, the north pole.
06:14The two poles work simultaneously and increase the attraction force.
06:18The dime-sized holes in elevator doors is actually a keyhole.
06:23If the doors get stuck, an operator can open them manually thanks to this hole.
06:28They'll just insert a special key.
06:30The tiny hole in the airplane window is there to balance air pressure.
06:35The window has three layers.
06:37The outer pane is extremely sturdy.
06:40It can withstand air pressure differences during takeoff and landing.
06:44The inner pane, which is the closest to you, is made of cheaper materials.
06:48It prevents potential damage to the window.
06:50The hole itself is in the middle pane.
06:53It not only balances the pressure but also prevents the window from fogging.
06:59Escalator brushes are there for your safety.
07:01They don't allow you to come too close to the edge of the escalator.
07:05This way, your clothes won't end up between the steps.
07:08You see the sun as yellow or orange.
07:11Because the atmosphere of our planet scatters such colors as blue, green, and violet.
07:16This is also why the sun looks warmer at sunrise and sunset.
07:21Go shopping for some oranges and I'm sure you'll get them in a red mesh bag.
07:25You'll rarely see them lying around without one of those.
07:28It's pure marketing and that color isn't a random choice.
07:31When packed in a red mesh bag, oranges appear more orange, fresher, and more appealing to you.
07:38So, you're more likely to buy them, right?
07:41Lemons are usually sold in green mesh bags for a similar reason.
07:45If you pack them in red, they'll appear more orange.
07:48Green goes better with yellow and makes those lemons stand out.
07:52Mattress manufacturers make a limited number of different mattresses.
07:56And the only way to make them look different is to come up with a fancy stitching pattern.
08:01Two mattresses of two different companies might be the exact same quality but cost differently.
08:06Most people will never know it and will decide that different patterns mean something in terms of quality.
08:12So, when shopping, don't mind the pattern at all.
08:16Almost all hotels have white bedsheets.
08:18They choose this color specifically to show how high their standards of cleanliness are.
08:23The whiter and brighter the sheets are, the more luxurious the hotel seems.
08:27It's much easier to see dirt and stains on white linen.
08:31It's like proof that you've checked into a clean room.
08:34If you look at it on the street, you'll think a fire hydrant is about 3 feet in height.
08:39But the actual size of the device used to provide water supply to firefighters all over the world is twice
08:44as large.
08:45That is, if you count the rest of the hydrant, which is hiding underground.
08:49They're mostly red and it's not just a matter of urban design.
08:52First of all, they need to be of bright, easily noticeable colors so firefighters can spot them fast when they
08:58need to.
08:58The choice of color depends on how much water the hydrant can hold.
09:02It can sometimes vary depending on the location, but here's the breakdown.
09:06A red fire hydrant can splash 500 gallons of water per minute, while an orange one at least 1,000
09:14gallons.
09:15Green ones mostly process 1,500 gallons of water per minute, and the most plentiful ones colored blue can generally
09:22contain over 1,500 gallons.
09:25Hey bowling fans, isn't it super annoying when your bowling ball gets cracked?
09:29Turns out that most of them get damaged because of incorrect storage or spikes in temperature.
09:35Now come on and face it, since it's already cracked a bit, aren't you curious what's actually inside the bowling
09:40ball?
09:41Because I sure am.
09:42Let's have a look.
09:43They mostly make the inner core of the ball of powdered metal oxides, like calcium or iron oxide.
09:49Then mix them with some resin and catalyst to harden the whole mixture.
09:53So that light bulb shape you now see inside of the ball is actually its heaviest part.
09:58It also influences how your bowling ball rotates when going down the lane.
10:03The same goes with spray paint cans.
10:05When you shake it, it makes a weird noise.
10:07But what is that thing in there?
10:09It's called a pea, and it's meant to hold the paint mixture in place and maintain its shape.
10:14They generally make it out of plastic, metal, or ceramic.
10:18It basically acts as a whisk to make sure your paint is well mixed together before you apply it to
10:23your surface of choice.
10:25Ever wondered how soda bottles keep that refreshing fizz for that long?
10:29Well, they have a little plastic ring fastened to the lid.
10:32They place it there to keep the gas from escaping and making the soda go flat.
10:37Even if you shake it around in your bag the whole day.
10:41Speaking of things we use on a hot summer's day, wait, wait, don't put your baseball cap on just yet.
10:46Take a look at it for a minute, and you'll notice there's a small button on the very top.
10:51Is it functional, or is it just there for the sake of design?
10:54Way back when people started using fabrics to cover their heads, some say the button was actually functional.
10:59Since it's on top of the cap where the fabric panels come together, the top button helps keep the cap
11:05crown in one single piece.
11:07Now, with recent advances in fabric and pattern design, the button is more of an aesthetic feature.
11:13It's used to cover up the joint point of the fabric panels.
11:16Your cap might not have a button at all, but don't you think a cap actually looks better with one?
11:22Cotton pads have two sides, and if you take the time to look at them carefully, they're actually different in
11:27texture.
11:28Just in case you've ever wondered why, the textured side is for applying makeup, and the even side is for
11:34removing it.
11:36Bookworms. This one is for you.
11:38Dust jackets that come with a lot of hardcover books are not just meant to make your book look pretty.
11:43They also double as a bookmark.
11:44Just fold the pages you've already read underneath the inside of the jacket, and voila!
11:51Next time you reach out for your favorite shirt, take a look at the top buttonhole.
11:54It should be stitched horizontally, and all the other ones are vertical.
11:59Turns out that the dress shirt was designed this way, since the first and the last buttons were the first
12:04ones to unbutton throughout the day.
12:06They then changed the direction of the buttonhole to ensure the shirt would stay nice and fitted before you're ready
12:11to take it off.
12:14These days, we have so many variations of this awesome dessert that it's hard to imagine we've ever lived without
12:19it.
12:20You can find different types of cookie dough ice cream or even chocolate chip cookie cake basically everywhere.
12:25But the famous cookie wasn't actually invented until 1930.
12:29The story goes that a woman named Ruth Graves Wakefield was preparing some chocolate cookies as she was waiting for
12:35some guests to arrive.
12:36She soon figured out she was out of Baker's chocolate, a crucial ingredient for the classic cookies.
12:42To fix things up, she chopped up a block of semi-sweet chocolate, thinking it would eventually spread out evenly
12:47throughout the batter, given the heat of the oven.
12:50Things didn't necessarily go as planned.
12:52But hey, it's great they didn't because this is how she invented this modern dessert we now can't get enough
12:58of.
12:59And speaking of popular snacks, the potato chip is even younger than the chocolate chip cookie.
13:05Well, at least historically.
13:07There are many stories trying to explain how it was invented.
13:10One of them goes like this.
13:12A chef named George Crumb, based in New York, put the chips together in 1953.
13:17He decided to try a different cooking solution when one of his customers didn't have nice things to say about
13:23his french fries.
13:24He said they were too thick and kind of mushy.
13:27Then, Crumb came up with potatoes that were thinly sliced and fried until brown.
13:32People absolutely loved the dish.
13:35And they welcomed the first ever batch of chips with open arms.
13:40Ice cream, anyone?
13:41If the story is true, back in 1904 at the St. Louis World's Fair, one ice cream shop owner ran
13:47out of cups to serve his dish.
13:48So, he fashioned a waffle into the shape of a cone, and the rest was history.
13:54Okay, I'll admit it, chewing gum-like treats have been around since the ancient Greeks.
13:59So this one isn't particularly a revolutionary discovery.
14:02But the actual gum we buy today wasn't there until the late 1800s.
14:07An American inventor named Thomas Adams wanted to mix together different chemicals to create rubber.
14:13He tried and failed, for that matter, to play with Chickle for his experiment, but ended up fashioning this neat
14:19treat.
14:19They still use Chickle to this day to produce most chewing gums.
14:24Back in the 1800s, there lived a man named Jean-Baptiste Jolie, who worked in the fabric industry as a
14:29textile maker.
14:31How he came up with this next invention that we use a lot these days has less to do with
14:35him and more to do with his maid.
14:37The story goes that the woman accidentally knocked a kerosene lamp over onto a tablecloth.
14:43Instead of getting upset over the damaged fabric, Jolie noticed that the substance actually made the material cleaner.
14:50Figured it out yet?
14:52Yep, that's how the idea for the very first dry cleaner popped up.
14:55A very neat accident, if I do say so myself.
14:59Now this one I loved.
15:01Did you know matchsticks were initially called friction lights?
15:04Or at least that's how their inventor, a chemist, named John Walker, called them back in 1826.
15:11He scraped a stick coated in chemicals across his hearth, totally by accident one day, and realized that they ignited
15:18and created a spark.
15:20Initially made out of cardboard, they were then made using wooden splints and sandpaper.
15:27Back in the 1940s, a man named Harry Coover stumbled upon a chemical formulation that seemed to stick to everything
15:33it touched.
15:34The scientific community at the time didn't look much into it, as the formula didn't seem to have many applications
15:40back then.
15:41It wasn't until 1951 that he looked a bit more into the formula and decided to repurpose it, along with
15:48a fellow Eastman Kodak researcher named Fred Joyner.
15:51They gave it a proper full name.
15:53But you must know it by the shorter version.
15:56Super glue.
15:58It also has many uses in security these days that it's hard to believe that we didn't come up with
16:03this one on purpose.
16:05Back in 1903, a scientist named Edward Benedictus knocked over a flask by accident.
16:11He looked down and was amazed to see that the glassware had just slightly cracked but maintained its shape.
16:17He was expecting it to break into a million tiny pieces.
16:21Curious about this hidden feature, he looked into it and figured out what was keeping the glass together was a
16:26substance coating the inside of the glass.
16:29Ta-da! That's how humanity came up with safety glass.
16:34If you ever find yourself stuck in the trunk of your car, stay calm.
16:38All cars are supposed to be equipped with an emergency latch to help open the trunk from the inside in
16:44the unlikely case it happens.
16:46These latches are so well thought out that they can be opened by people of all ages.
16:51More so, handles are designed to glow in the dark, too.
16:55You can even pull them with a mouth if there's not enough wiggle room to use your hands.
16:59Never mind how you ended up in the trunk in the first place.
17:02Moving on!
17:03If you're ever working with needle and thread, remember you don't need to stick the needle directly into the spool.
17:10You may end up losing the needle altogether.
17:12Not to mention you can easily hurt your fingers!
17:15A lot of modern sewing kits these days come with a designated place for safeguarding the needles.
17:21It's located at the bottom part of the thread spool.
17:24You'll just need to pull it out.
17:26It's even made to hold multiple sewing needles at a time.
17:30Disposable ballpoint pens come with a little secret of their own.
17:34Did you ever notice that in some of them, there's a small hole in the plastic part?
17:39It's actually a rudimentary ventilation system.
17:42It's supposed to let the ink easily make it to the tip of the pen.
17:46Okay, I know it's in the name, but you really don't need to shake the seasoning shaker to get any
17:52product out.
17:52Don't believe me?
17:54Hey, you're not the only one.
17:55Go grab your favorite seasoning bottle out of your pantry.
17:59If it has one of those removable plastic caps, it's perfect for the experiment.
18:04Instead of shaking the bottle, try holding it from the plastic cap while it's upside down.
18:10Now gently twist the bottle from side to side and, before you know it,
18:14you get some gorgeously flowing seasoning without having to wiggle the shaker and make a mess all over the stove.
18:21On the same note, most salt and pepper shakers should have ridges on the bottom of the glass portion.
18:28In case you get any seasoning stuck in there,
18:30place the bottom of the salt shaker against the bottom of the pepper shaker and wiggle it around,
18:35so the ridges click with each other.
18:37The seasoning should easily pour out now without you having to open the bottle.
18:42In colder weather, you often have so many clothing layers on you
18:46that you can hardly feel the purse or back straps on your shoulder anymore,
18:51not to mention how fast they can slide off.
18:54Some jackets come with a built-in solution for that,
18:56in the form of a small tab on the shoulder with either a hook or a button.
19:01It's meant to be opened and closed comfortably,
19:03so you can keep your purse in place at any time.
19:08You're most likely using it merely to peel the skin of potatoes, carrots, or cucumbers.
19:13But you can use your vegetable peeler for chopping fine strips of onion as well.
19:18Just cut the onion into quarters vertically and then start slicing.
19:23This might also help out with those embarrassing onion tears.
19:27Most people miss this one, but should you ever have a closer look at your toothpaste tube,
19:33you will surely see some sort of coloring there, either a dot or a block.
19:37Colors can vary.
19:39They can be black, green, red, or even blue.
19:42These color spots are actually meant to help the assembly machines back at the toothpaste factory.
19:47They recognize when and where these machines need to cut the toothpaste tubes
19:51and proceed to fold them for packaging.
19:54For most types of footwear, if there's anything that seems a bit out of place,
19:58always know that it's there for a reason.
20:01Most manufacturers don't put extra items on shoes just for fun.
20:05It would definitely be a waste of time and resources.
20:08For footwear, like boots, for example,
20:11there's often a small loop at the top back of the shoe.
20:14It's there to help you when you need to put the shoe on,
20:17since you can quickly pull on it.
20:19Plus, you can also hang the shoes somewhere,
20:21most likely to dry, since most boots are meant to be worn in the colder weather.
20:26Now, I've been guilty at least once of overdressing with a bunch of layers,
20:31just so I won't need to jam everything in my check-in bag.
20:34But does it become a problem when you actually have to get seated?
20:38What do you do with your coat or your jacket?
20:41Well, have a closer look next time you board a plane on the seat in front of you.
20:45The hook that keeps the tray table upright can double as a jacket hook.
20:51As long as you don't need to have any meals while in the air, you're good to go.
20:55Now, most mascaras expire within 3-6 months, I'm told, depending on the manufacturer.
21:01But you can help speed up that process if you're not careful enough.
21:06Continuously pumping the mascara wand, trying to mix in the product,
21:10actually pushes more air into the tube.
21:12This can make it dry much faster,
21:14and you evidently won't get the desired results with it anymore.
21:18There's an easy way to check if your mascara is still good enough to use.
21:22If you don't hear a popping noise when you take the brush out,
21:26you may very well need to go get yourself a new mascara tube.
21:30Now, I know we're living in the era of Bluetooth-connected devices.
21:35But for better quality sound, they still recommend using headphones that connect via audio jacks.
21:41Remember seeing black ridges on those jacks?
21:44They aren't there just to make them fit when you plug them into your phone or laptop.
21:48Made out of a special insulating material,
21:51these bands are meant to guard the wires when sound is being transmitted.
21:56Based on the number of bands, you can figure out which end goes where.
21:59Some empty space under noodles in a cup doesn't mean the company producing them wants to cheat you out of
22:06a full portion.
22:07No, no.
22:07It's a manner of keeping the noodles intact during their transportation.
22:11It also helps with the circulation of hot water that is poured over the products before you can enjoy them.
22:17The V-shaped neckline was initially designed to serve a bunch of objectives.
22:22First, as a way of prolonging the life of the garment that would maintain its shape over the years.
22:28It's also there to fit your head through the shirt in case it needs some stretching.
22:32This way, it ensures a snugger grip around the neck.
22:35Lastly, it helps absorb sweat in case you're wearing the shirt while exercising.
22:41Now, it's not necessarily a custom anymore,
22:43but you may have stumbled upon a dinner jacket with an additional mysterious pocket on the right side.
22:50Turns out, this pocket was used by men to easily reach their train tickets,
22:55since most of them had to travel to work every day.
22:58It helped them keep their jacket buttoned up, but also benefited from the use of a pocket.
23:03Now, it's only added as a decoration, and it doesn't serve an actual purpose anymore.
23:08Speaking of things we don't use these days, or at least for their initial purpose,
23:13did you know Play-Doh was originally a cleaning product?
23:17In the 1920s, the market was in need of a product
23:20that could help them wipe the wallpapered areas around coal-burning furnaces.
23:25The recipe for what we now know as Play-Doh was thus invented.
23:29It was manufactured in white only,
23:32and was supposed to clean wallpaper by being rolled back and forth over the dirt.
23:36It was only later, in the 1940s, that new products for cleaning wallpaper were brought up,
23:42and Play-Doh was redirected toward another area of the market.
23:47Now, while I enjoy a nice piece of toast for breakfast,
23:50isn't it pesky to have to clean out the toaster?
23:53Well, not anymore, since I recently found out that toasters have a slide or a panel at the bottom
24:00that helps get rid of all those annoying breadcrumbs easily.
24:06Now, there used to be a time when you could only have access to video games
24:10by inserting cartridges in your console of choice.
24:14These tiny objects gave many doctors a lot of headaches.
24:17People soon started popping up in hospitals after swallowing small game cartridges,
24:23especially the younger generation.
24:25Nintendo, the company that manufactures the majority of these devices,
24:29had to come up with a creative solution to prevent these accidents.
24:33So, these days, Nintendo Switch cartridges are purposely coated with specific chemicals
24:39that can leave a really bad bitter taste in the mouth.
24:42Not that I'd, you know, recommend you ever try and taste for yourself.
24:46Hmm.
24:47Whether it's something as simple as a button on your jeans,
24:50or something that's part of a larger moving mechanism,
24:53here are 26 secrets to everyday things you probably didn't know about.
25:00You use doorknobs every day,
25:02so it's right to be concerned about how many germs could be on them.
25:05However, they have made doorknobs out of brass partly for that reason.
25:10Brass provides an antimicrobial effect,
25:13eliminating the microorganisms that were hoping to start a colony on your doorknob.
25:18Your pants have that one-fifth pocket that's recognized as the small useless one.
25:24Originally, it was there to provide a safe place for your pocket watch,
25:28something that was necessary when first implemented in 1901.
25:31It then continued to remain for traditional purposes.
25:34However, it's still a great place to put your Tic Tacs.
25:38You've probably mistaken those little rivets on your jeans as some form of fashion statement,
25:43similar to the small pocket.
25:45In fact, they're incredibly important.
25:48They are there to provide extra support for areas that withstand the most strenuous parts of your clothing,
25:54preventing them from embarrassingly falling apart.
25:58That little button at the end of your seatbelt seems like it's way out of place.
26:02In fact, it's there to ensure your buckle will always remain at the end,
26:06so you won't have to awkwardly fiddle with your seatbelt every time you put it on.
26:11You're in a new car or a rental,
26:14and the gauge tells you the gas is getting low.
26:16You don't know which side the fuel cap is on from the inside.
26:19It can cause unnecessary effort at the gas station.
26:23However, your fuel gauge has an arrow that reminds you which side to fill your gas tank up from.
26:29Some models of cars may also have a gas tank hose instead, with the hose pictured on the side that
26:35the cap is on.
26:37Hiking and walking through snow requires the best kind of footwear.
26:42The shoes, which are perfect for this, also have an extra eyelet for your lace to loop through.
26:48Looping your laces through the extra eyelets will give more support for your ankles and feet,
26:53and will provide more stability as you walk.
26:55But, as you walk, blisters are also a concern.
27:00The sweat in your shoe creates friction between the feet and the shoe, which then helps create the blisters.
27:07Antiperspirant that you use for your armpits will help keep the feet from sweating.
27:11Just make sure you use the clear one.
27:15Cooking for people is always nice.
27:17However, sometimes the guests are late.
27:20Yep, we're all guilty of that sometimes, right?
27:23The extra drawer under your oven, where you've been keeping all of your spare pots and pans,
27:29was actually made to keep your food warm.
27:32Great for those who are late to the meal.
27:34Ever wondered how long that padlock could possibly last when it's outside?
27:39In the rainy weather, keeping your bike safe?
27:41It has a little hole at the bottom of it.
27:44It's there to drain water to avoid corrosion on the inside.
27:48It also serves to provide oil, further prolonging its use.
27:53That hole in the elevator door isn't there to check who's inside,
27:57so you can avoid sharing a ride with specific people.
28:00It's a keyhole, in case it breaks down.
28:05Ketchup, sauce bottles, and all other condiments we love
28:08all have a stage when it's difficult to get the insides out.
28:11You try hitting it, shaking it, and poking things inside
28:15to encourage the tasty condiments to come out.
28:18Luckily, there is an easier way to do it.
28:21The label at the top suggests where to tap the bottle.
28:25The sauce will come out easier and smoother,
28:28allowing gravity to take the place of frustration.
28:32The purpose of wooden coat hangers is to help repel pesky insects
28:36and avoid fungal growth that eats away at your clothing,
28:40as it's made of cedar wood.
28:42It contains oils that have insecticidal and fungicidal properties
28:46and were used as far back as the ancient Egyptians,
28:50although they used it for other purposes.
28:54We've all been trained and tested at the art of typing
28:57and know the correct way to use a keyboard.
29:00But you may not have noticed that the F and J keys have a small ridge at the bottom.
29:06They're there to help you find your correct starting place
29:09with your fingers on the keyboard, without having to look down.
29:13If you've been lucky enough to get the window seat on the plane,
29:16you would have noticed that little hole at the bottom of the window.
29:20It helps with the air pressure on the plane.
29:22The window itself is made from acrylic and isn't actually glass,
29:27which saves it from fogging up so you can see the scenery on your journey.
29:31The windows on planes were originally square.
29:35However, they would continuously break from the constant changes in pressure.
29:39Round windows are able to evenly distribute the pressure,
29:42ensuring you'll have a pleasant journey without falling out.
29:46For all you Nintendo Switch players,
29:48those who have tried to taste your cartridges will notice they have a bitter taste.
29:52The manufacturers added it intentionally,
29:56as the Switch's cartridge size is very small
29:59and it might be a hazard for the youngest players
30:01that have a tendency to put things in their mouth that they shouldn't.
30:05So the bitter taste made from denotonium benzoate
30:08ensures that they won't be tasted for too long.
30:12Cosmetics containers that are filled with products
30:14used for your skin have a secret number on them.
30:18This is to help inform you how long the product will be usable,
30:22ensuring it doesn't cause the reverse effect
30:25by damaging your skin instead.
30:28Pen lids have a hole at the end of them.
30:31It's not there to help your pen breathe and boost performance,
30:34but it's there to help you breathe.
30:36Just in case while you're sitting in class or at work
30:39and you're chewing on your lid and just happen to swallow it,
30:43you can be rest assured if it's stuck,
30:45the pen makers were thinking of you.
30:48When you're traveling by car or any other form of ground transportation
30:52and you're trying to drink your favorite pop from a straw,
30:55you'll find it quite difficult to do at times.
30:58Simply turn the tab on the can around
31:00so that your straw easily fits inside,
31:03making it easier to drink out of.
31:06There are always spare buttons when buying new clothes,
31:09along with a little bit of fabric.
31:11It's far too small to repair that crutch part that always rips first.
31:15The fabric is actually there for you to test how to wash it
31:19so you don't accidentally ruin your brand new clothes.
31:23Determining how much pasta you need just for yourself
31:26can be difficult to figure out.
31:27Your big spaghetti spoon with the big hole on the inside,
31:31that looks like it's there to drain water,
31:33is actually there so you can put the uncooked pasta inside before cooking
31:37so you know exactly how much you need.
31:41New shoes always come with those strange little packets.
31:45That's silica gel.
31:46The gels are there to reduce the moisture in the air
31:49to avoid any fungal growth while the shoes were waiting to be purchased.
31:54There's a lot of chemistry involved to get you that silica,
31:57and it's very effective, capable of absorbing 50% of the humidity.
32:02So make sure you don't throw it away.
32:04Next time you need to dry out your electrical devices,
32:07it's a lot easier than using rice.
32:10It's difficult enough to see at night whilst driving,
32:13but it's even worse when the driver behind you shines their high beams.
32:18Your rearview mirror has a tab at the bottom.
32:21When you press it, it changes the angle.
32:23One is for day driving, the other, well, for night time.
32:27It'll help in case that one person driving behind you
32:30has forgotten to turn off their high beams.
32:32Although your screwdriver is ergonomically made for your hand,
32:36sometimes you have that one screw that's too hard to loosen up.
32:40The handle is also shaped so you can easily fit inside of a ring spanner or wrench,
32:45allowing you to apply more force,
32:47ensuring that you can remove that troublesome screw.
32:51The skirt part on an escalator seems like a good spot to get your foot stuck.
32:55But in reality, those long brushes poking out
32:58aren't there to give you an extra shine on your shoes.
33:00But for safety precautions,
33:02to minimize the risk of trapping objects
33:04between the steps and the side of the escalator.
33:09Have you ever stopped to think about the thrilling secrets
33:12of day-to-day modern life on planet Earth?
33:15I'm talking about tiny windows and washing machines
33:19and little holes in airplane windows.
33:21If you haven't got a clue of what I'm talking about,
33:25tag along and allow yourself to be as surprised as I was when I found out.
33:31Remember the drawer at the bottom of your oven?
33:34Maybe you've been ignoring it all along or using it to store pots and pans.
33:39Well, even though it can serve this function,
33:42that's not the only thing it's there for.
33:44The best way to use the bottom drawer
33:46is to keep your meal heated while you're waiting to serve it.
33:49Genius, right?
33:52Talking about secret doors,
33:54have you noticed that most washing machines
33:56have little flap doors at the bottom too?
33:59These doors actually serve as drain traps.
34:02It's where all the items that we put to wash together
34:05with our jeans and jackets go to.
34:07It's a type of collector, let's say, of small items.
34:11It stops them from getting into the main drain pipes and clogging them.
34:16It saves us hundreds of dollars in repairs each month.
34:20Now, who hasn't gone through the confusing task
34:24of having to measure how much pasta to cook for one serving?
34:27Well, here's the solution.
34:30The holes in the center of pasta spoons.
34:33They were actually made for measuring
34:35the exact amount of dry pasta you need for one serving.
34:39If you try stuffing wet cooked pasta through it,
34:42well, good luck with that.
34:45On a similar topic,
34:46have you ever wondered why pen caps have holes in them?
34:50Maybe you thought it was a design feature
34:52to regulate air pressure.
34:53But in reality,
34:55these holes have a much simpler and more important function
34:58to reduce the risk of choking.
35:01Now, lots of people love to bite on their caps.
35:04And this tiny hole prevents them from choking
35:07in case they accidentally swallow a cap
35:09and it gets stuck in their throat.
35:11For kitchen lovers,
35:13there's a hidden secret right in front of your eyes
35:16that can change your life.
35:18Think pans.
35:19Now think handles.
35:21Right, they have holes in them.
35:23As it turns out,
35:24these holes were designed to hold the spoon
35:27you're using for cooking.
35:28And instead of dripping sauce
35:30all over the stove or your kitchen floor,
35:33you can place the spoon in the hole
35:35and let it drip the sauce
35:37directly back into the pan.
35:39Woo-hoo!
35:40Speaking of everyday items,
35:42and I was,
35:44most doorknobs are made of brass
35:46because this material makes them naturally germ-free.
35:49Unlike plastic ones,
35:52brass doorknobs are kind of magical.
35:54They can disinfect themselves
35:56without you having to clean them.
35:58Neat, right?
36:00Have you ever noticed
36:01that at the bottom of a measuring tape
36:04there is a little dip?
36:05You can find it in that metallic part
36:08you need to pull on to measure something.
36:10Well, that dip is actually
36:12the exact size of a regular nail.
36:15It was designed for people
36:17to place the tape on top of a nail
36:19and use it as a support
36:20while they stretch the tape.
36:22Well, I can't wait to try it out for myself.
36:25As for the margins in your notebook,
36:28they were invented to protect
36:30people's notes from mice.
36:32No, the mice weren't copying
36:34your answers for the math quiz.
36:37Actually, there were times
36:38when people had to cohabitate
36:40with rats and mice
36:41that often chewed on paper.
36:43So, to prevent information
36:45from getting completely lost,
36:47people created margins.
36:50This way, texts were moved closer
36:52to the middle of pages
36:53and remained unharmed by rodents.
36:57Hmm, perhaps this is where
36:59to digest information came from.
37:02And what about those tiny holes
37:04at the bottom of airplane windows?
37:07They have an extremely important function
37:09of regulating the air pressure
37:11inside the cabin.
37:12In other words,
37:14they help planes fly high up in the sky.
37:17Big responsibility, right?
37:19By the way,
37:21tray tables on an airplane
37:22are the germiest places
37:24inside the entire cabin.
37:26Studies showed that the trays
37:28had eight times the amount of germs
37:31on the toilet flush button.
37:33Now, how about we cut
37:35a commercial airplane in half
37:37and see what's inside?
37:39Well, it would look more or less
37:41like this.
37:42Rows of seats on top
37:44and everything else
37:45that needs to be stored
37:46at the bottom.
37:47I'm talking about
37:48passengers' luggage,
37:50emergency supplies,
37:51parts of the wing system,
37:52and so on.
37:55Moving on to bowling balls.
37:57Yes, I know it's a clumsy transition.
38:00Anyway,
38:01have you ever wondered
38:02what the insides
38:04of a bowling ball look like?
38:05If you have cut
38:06a professional ball in two,
38:08you'll see a familiar shape.
38:10Look closely.
38:11Do you see it?
38:12Doesn't that look like
38:13the logo of Brightside?
38:15Anyway,
38:17professional bowling balls
38:18are different
38:18from the ones
38:19in your local bowling alley.
38:21That's because
38:21they're designed
38:22to make fancy moves.
38:24They actually have
38:25some really complex
38:26engineering inside.
38:27They're shaped
38:28to help skilled professionals
38:30get more strikes.
38:31The weight of professional
38:33bowling balls
38:33is designed to be projected
38:35inward as they travel
38:36down the bowling lane.
38:38This makes it harder
38:39for them to get
38:40into the gutters
38:41on the sides of the lane.
38:43Speaking of balls,
38:45let's take a look
38:46inside a baseball.
38:48To make it light
38:49and aerodynamic,
38:50producers use
38:51several different layers.
38:53Starting from the core,
38:54we have a cork center
38:56enveloped by black rubber.
38:58Then,
38:58there's a layer
38:59of red rubber
39:00followed by two or three
39:02alternating layers
39:03of wool yarn.
39:04After that,
39:05there's a visible
39:06white leather cover
39:07and that beautiful
39:08red seam on the side,
39:10stitching it all together.
39:13And,
39:14what if you had
39:14x-ray vision
39:15and managed to look
39:16inside a human bone?
39:18Ooh, spooky!
39:20I'd say
39:21what caused
39:21most attention
39:22is this spiderweb-like
39:24situation
39:25at the center
39:25of the bone.
39:26In reality,
39:27it's a highly condensed
39:29and complex
39:30structure of nerves
39:31that you have
39:32inside your bones.
39:33Aren't you lucky?
39:35Now,
39:36I've got a riddle for you.
39:38What is round
39:39can be found
39:39near the ocean
39:40and looks like
39:41an aerial view
39:42of the Guggenheim Museum
39:44in New York City,
39:45the one that's made
39:46almost entirely
39:47of ramps.
39:48If you said
39:49a nautilus shell,
39:50hey,
39:51then you guessed right.
39:52A nautilus
39:53is a shellfish
39:55whose house
39:55you can find
39:56in countless
39:57souvenir stores
39:58near the beach.
39:58It's made up
40:00of two layers,
40:01a matte white
40:02outer layer
40:03and an iridescent
40:04white inner layer.
40:05And if you were
40:06to cut it in half,
40:08it would look
40:08very similar
40:09to the insides
40:10of the Guggenheim Museum.
40:12Aloe leaves
40:13are good
40:14for healing purposes
40:15and also
40:15for hydration.
40:17But if you managed
40:19to look inside
40:20of an aloe leaf,
40:21the image you'd see
40:22would be satisfying
40:23and very relaxing.
40:25Who hasn't dreamed
40:27of a pool
40:27filled with jelly?
40:29Now,
40:30there seems to be
40:31nothing more mundane
40:32and regular
40:33than a tube
40:34of toothpaste.
40:35But you wouldn't
40:36think so
40:37if you cut open
40:37a tube
40:38that contains
40:39several colors.
40:40Now,
40:41there have been
40:41speculations
40:42that the insides
40:43of such a toothpaste tube
40:45might be divided
40:46by barriers
40:47so that the stripes
40:48don't mix.
40:49But if you cut it
40:50in half,
40:51you'll see that
40:52it has only
40:53one interior chamber.
40:55As it happens,
40:56there's a lot
40:57of science
40:58behind the making
40:59of striped toothpaste.
41:00According to a specialist,
41:02they have to ensure
41:03that the paste
41:04in all the stripes
41:05has the same
41:06physical properties.
41:07This way,
41:08the colors
41:08are naturally prevented
41:10from mixing
41:10with one another.
41:11That's why,
41:12if you tear a tube open,
41:14you'll see something
41:14that looks like
41:15several slices of pizza
41:17in different colors.
41:19If you open your closet,
41:21you're bound to find
41:22at least a few
41:23wooden hangers.
41:24Usually,
41:25they're made of cedar wood,
41:26which is a natural
41:27moth repellent.
41:29So,
41:30cedar hangers
41:30actually protect
41:31your clothes
41:32from moth infestation.
41:34For some people,
41:35more than others,
41:36eyeliner is an everyday must.
41:39Boy, isn't it.
41:40But,
41:41did you know
41:41that back in
41:42ancient Egyptian times,
41:44both men and women
41:45used coal eyeliners
41:47to protect their eyes
41:48from the sun's glare?
41:50Way to go
41:50for the Egyptians
41:51for figuring that out!
41:53Now,
41:54if I could just learn
41:54to walk like one!
41:57Normally,
41:58we use headrests
41:59for the purpose of,
42:00well,
42:01resting our heads,
42:02right?
42:03Well,
42:04not only!
42:05As it turns out,
42:06headrests can be
42:07easily removed
42:08from the seats
42:09and used to break
42:10car windows
42:11in case of emergencies.
42:14Now,
42:15this one is a trick
42:15very few people
42:16know about.
42:18You probably
42:18place your doormat
42:20horizontally,
42:20like most of us do.
42:22But doormats
42:23serve the purpose
42:24of absorbing dirt
42:25from the soles
42:26of your shoes
42:26before you enter
42:28your home.
42:28So,
42:29for this function
42:30to work as it's
42:31meant to,
42:32the best way
42:32to place a doormat
42:33is vertically.
42:35This way,
42:36you take more steps
42:37on the top
42:38of the doormat
42:39before entering
42:39your house.
42:41And,
42:42last but not least,
42:43now,
42:44I don't want to be
42:45accusatory here,
42:46but you have
42:47probably been
42:47vacuuming your house
42:49the wrong way.
42:50And I can prove it.
42:52Most people
42:52just vacuum floors
42:54and carpets
42:54in one direction
42:55or move the brush
42:57back and forth
42:57several times,
42:58thinking they've got
42:59all the dust out.
43:00But according to
43:02cleaning professionals,
43:03the best way
43:04to vacuum
43:05is in rows.
43:06First,
43:07you go forward
43:07with the brush
43:08until you arrive
43:09at the end of the row.
43:10Then,
43:11you fluff the carpet up
43:12and move back down
43:14along the same row,
43:15gathering the dust
43:16that wasn't collected
43:17in the first sweep.
43:19Talk about
43:19efficient cleaning.
43:20On the other hand,
43:22my idea of house cleaning
43:24is to sweep the room
43:25with a glance.
43:26Hey,
43:27I don't want to disturb
43:28that protective layer
43:29of dust.
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