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Discover what 13q means, why it matters, and how it’s interpreted in context. Learn the most important facts about 13q in clear, simple language. This overview gives you a quick, accessible foundation so you can explore the topic with confidence.
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00:00The Queen's Guard all appear to have the same uniform, with a shared role of standing stoically for a long
00:06time.
00:07But if you look closely at their hats, there are five different types.
00:12The Grenadier has a white plume, the Coldstream has a red one, the Irish a blue plume, the Welsh green
00:19and white, and the Scots Guard has none.
00:23Their different divisions perform similar ceremonial duties at Buckingham Palace, but they have other actual roles as well, suited to
00:32their specialization.
00:34When peeling your boiled eggs, you can see a hidden layer under the shell.
00:38These two membranes, an inner and outer one, are made from the same stuff as your hair, keratin.
00:44It protects the inside from bacteria and stops liquids from escaping.
00:49You use X in your texts, which represents a kiss. It's been used this way for a very long time.
00:55Its original purpose dates back to the Middle Ages, where it was a representation of a person's faith, honesty, and
01:02sincerity.
01:03Those that would sign off with an X would kiss it after signing as a display of a sworn oath.
01:10The X's meaning later changed to represent the action of kissing.
01:14And the first document showing this was a letter dating back to 1763, written by a naturalist, Gilbert White, who
01:22sent it to his wife.
01:25William Shakespeare is a name familiar to everyone.
01:28However, we don't know whether this was the actual way his name was spelled, and neither did he.
01:34He signed 80 different variations of his name spelling on all his works.
01:39Historians haven't a clue which the correct spelling is.
01:42The version that we know of was only used on two of his plays.
01:48Different forms of alarm clocks were invented as far back as 348 BCE, with many versions throughout the world, all
01:56with complicated mechanics.
01:58Unaffordable to mostly everyone, they didn't catch on.
02:02Alternate methods to wake up in the morning started to be used in the 1800s.
02:06One process involving knocker-uppers was common in some countries.
02:11A person visited your house every morning to knock on your door four times.
02:17Inventor Antoine Rédier felt that he should be woken only when he felt it necessary.
02:22So, in 1847, he invented the first adjustable alarm clock.
02:28Tennis balls in Wimbledon must be kept at a perfect temperature to ensure they bounce at a consistent level.
02:35They're stored at 68 degrees Fahrenheit, so they're cold enough that the molecules inside the ball shrink, ensuring they bounce
02:42lower.
02:43Then, they're continuously swapped throughout a match as they expand by being hit too much, becoming too bouncy.
02:51Wimbledon goes through 50,000 tennis balls each year.
02:56You enjoy the smell of a freshly mowed lawn, as you associate it with the weekends and summer.
03:02But that smell is a sign of stress made by the grass.
03:05Grass evolved to emit various elements when being eaten by bugs.
03:10This signal attracts predator insects to remove them.
03:14But unfortunately for the grass, there's nothing large enough to deter a lawnmower.
03:19There is no oxygen inside your packet of chips.
03:23If there was, it would influence the combination of molecules forming inside, spoiling the chips faster.
03:29The packets are instead filled with nitrogen, which pushes oxygen out.
03:34And this extends the shelf life and quality of your chips.
03:39You're traveling by plane overnight and just can't get to sleep.
03:43And the first night in a hotel wasn't great, regardless of how comfy the bed was.
03:48This is because of a human evolutionary trait called the first night effect.
03:54When you sleep in a different place than your home, the left side of the brain responds to more sounds
04:00while you're asleep.
04:01It continues to analyze your surroundings without you realizing, acting as though it's on a night watch and keeping you
04:07alert for any potential dangers.
04:10Most animals have this trait, although it's a lot more subtle in humans.
04:15But it's still effective enough to make sure you get your peanuts.
04:20Before playing basketball with hoops, you would have instead been playing with peach baskets.
04:25When the game was invented in 1891, a peach basket was used, with the bottom of it cut off.
04:31But it only took 15 years for players to grow tired of constantly collecting the jammed balls and to remove
04:37the basket altogether.
04:39When you click your fingers, the snapping sound isn't from the physical click of finger and thumb.
04:45The noise actually comes from the finger hitting the palm.
04:50The instant film for the first Polaroid cameras didn't have their own coating after taking a photo.
04:55To develop it, you applied it yourself.
04:58Waiting for it to dry took a long time, so shaking it sped up the process.
05:03Then, from the 1970s, the film provided everything required for the photo to develop,
05:08making the popular craze of shaking Polaroids pointless.
05:12Shaking the photo can cause the ink to wave or blur before drying properly,
05:17so you shouldn't actually shake it like a Polaroid picture, and just wait patiently instead.
05:23Bug spray doesn't repel all bugs, especially the worst of them all, mosquitoes.
05:28It does cover the scent of carbon dioxide, which is what attracts mosquitoes.
05:33But the spray only protects you for a short distance.
05:37Mosquitoes can also track carbon dioxide over long distances.
05:41They will continue to stalk you until they find a gap in your invisible bug shield.
05:46A great alternative is lavender, which contains linalool.
05:51This fragrance completely overloads the mosquito's senses, making it unable to track you.
05:57The half-belt on the back of some jackets appear like a fashion accessory.
06:02It was initially designed that way for larger jackets,
06:04as they could also be used as a blanket to wrap around oneself.
06:09The belt's position helps hold the material together,
06:11so it's easier to walk with whilst keeping you warm.
06:16Ketchup wasn't originally intended to be your favorite condiment.
06:20In 1834, a physician, John Cook, sold ketchup as a cure for indigestion.
06:26It was an immediate hit, and today, 10 billion ounces are purchased annually in the USA,
06:33although not as the intended medicine.
06:37Thomas Edison made over 1,000 inventions,
06:40and one in particular, the lightbulb, is most famously linked to him.
06:44However, he didn't actually invent it.
06:47Warren Delarue, a British chemist, had solved this scientific challenge 40 years earlier.
06:53There were also 20 other inventors who made alternate versions before Edison did.
06:58But earlier varieties relied on cotton thread and only lasted up to 14 hours.
07:04Edison, in 1880, used a carbonized bamboo thread instead,
07:09and his worked up to 1,200 hours.
07:12It became the most commercially viable lightbulb,
07:14and today's ones are similarly shaped to Edison's original.
07:19The first treadmill was used in England in 1818.
07:23It was a large wooden cylinder with a handrail,
07:26although it wasn't used to keep fit.
07:29Convicted criminals would be forced to use these for up to 10 hours per day as a punishment.
07:35The energy output potential was realized,
07:38and soon it was built to work with water pumps and grain grinders.
07:42It was so effective that it was used in all prisons throughout the country.
07:46But in 1902, it was decided that it was too harsh and stopped.
07:50And now, this cruel punishment is mainly found in gyms.
07:55During the 1940s, there was a shortage of cocoa,
07:59and it was important to find a solution to this problem.
08:01A production company found a way by mixing only a small amount of cocoa with hazelnuts and milk,
08:08and the original Nutella was created.
08:11It started out as a loaf spread, like a stick of butter.
08:14It then transformed into a creamier version inside a jar in 1951.
08:19But it wasn't until 1964 that it was given its famous name.
08:24Your passport might be a dark shade of either green, blue, or red.
08:29The darker color not only makes them appear more official,
08:33but is intended so that through its journeys,
08:35the dirt that's collected is more easily hidden.
08:39Wasabi was first used back in the 8th century.
08:43It wasn't meant as a spicy condiment as it's served with sushi today.
08:47Initially, it was used for its antimicrobial properties
08:50that help avoid the harmful reactions to fish with sushi that's a bit too old.
08:59I have a collection of questions you've always wanted the answers to.
09:04Let's go!
09:06First, an observation.
09:08Cookies and baguettes are basically kinds of bread.
09:11So my question is,
09:13Why, when left outside for the night,
09:16a cookie gets soft and a baguette becomes hard?
09:19It doesn't make any sense.
09:22Well, the thing is, cookies are sugary bread.
09:26The sugar and salt in them soak up the moisture from the atmosphere.
09:29So, they get soft.
09:32Baguettes don't have much salt and sugar,
09:35so they don't attract water and just dry out.
09:40Superglue sticks everything to everything,
09:43but how come it doesn't get stuck to the tube?
09:45Turns out that the glue needs some compound with hydrogen to polymerize.
09:52In the tube, there's just oxygen and no water.
09:55But outside, there's plenty of moisture.
09:58Also, this explains why the stuff always sticks so well to your fingers.
10:03They're warm and perfectly moist.
10:07I'm sure you cried at least once when cutting an onion.
10:11Why does it happen?
10:12So, onions and garlic contain amino acids,
10:16and one of the compounds gets decomposed when being sliced.
10:19It turns into an irritator when it comes in contact with water.
10:24In particular, your eyes.
10:26Your eyes release tears to wash the irritant away.
10:29So, that's why you cry.
10:32There are a couple of tricks that can prevent it.
10:34When cutting an onion, try keeping a sugar cube between your teeth.
10:38It'll absorb the irritant.
10:39Another life hack is to hold a small piece of bread between your lips.
10:43It can help you too.
10:47Why do you see things when rubbing your eyes?
10:49These colors and shapes are called phosphenes.
10:53The reason why you see them is that when rubbing,
10:55you increase the pressure in your eyeballs
10:58and activate the neurons of the retina that process visual information.
11:02Once they're activated, your brain interprets it as seeing something.
11:08When you don't get enough sleep or are just too tired,
11:11you get those dark circles around your eyes.
11:14Want to know why?
11:15The skin under the eyes is very thin,
11:18so blood vessels are very close to the surface there,
11:21and you can see any difference easily.
11:24If you have a lack of sleep,
11:25your skin gets paler,
11:27and the blood vessels are even more visible.
11:29So you can see those dark circles showing through the skin.
11:33Also, with age, the skin naturally gets thinner,
11:37so that's why older people tend to have dark circles.
11:40But if you're young, just try to get more sleep.
11:45Let's pay a bit of attention to backpacks.
11:48They have a few interesting features.
11:50First, some of them have sternum straps,
11:53and they are quite helpful.
11:55They allow you to redistribute the weight of the backpack a bit,
11:58lifting some of it from your shoulders.
12:00Not much, but just enough to make your backpack lighter and easier to carry.
12:06And, of course, the sternum straps prevent the shoulder straps from sliding off.
12:12Okay, the next thing is gear loops.
12:14And probably from the name of it,
12:16you already have an idea of what you need them for.
12:20You can strap in some useful gear you need with you,
12:23like trekking poles or shovels.
12:25Some gear will need to be secured to do it.
12:28Drop the handle through the loop and rotate it upward.
12:31Then, secure it with the elastic hook at the top,
12:34and you're golden.
12:36And yes, all backpacks have loops.
12:39Actually, I never thought of their purpose until today.
12:42Some people say that if you slide your thumbs through them,
12:45it makes the backpack sit tighter on your back,
12:48making it more comfortable.
12:50Other people just rest their hands there.
12:52But the reason why they're there is probably
12:55to prevent the ends from sliding back from the buckles.
12:58That would be quite a headache to slide them back all the time, right?
13:04Okay, let's look into some other ordinary stuff
13:07we've never paid attention to.
13:09Let's take, for example, jeans.
13:12They have those metal rivets.
13:14It turns out that they've been there as long as jeans exist.
13:18Jacob Davis, the man who made the first pair of jeans,
13:22added copper rivets to places where the pants were more likely to rip
13:25to make them stronger.
13:27So, it was a crucial detail to keep jeans together.
13:31Today, they have a more decorative purpose
13:34because they're distinctive and traditional for jeans.
13:38Also, many zippers have the letters YKK engraved on them.
13:43Those are the initial letters of Yoshida Kogyo Kabushiki Gaisha.
13:48It's the name of a Japanese company that can be translated as
13:52Yoshida Manufacturing Shareholding Company.
13:55It's the largest zipper manufacturer in the world,
13:58so all zippers produced by them are marked with these letters.
14:02It's estimated that the company produces half of all zippers in the world.
14:08That's why you see their zippers more often than any others.
14:14Have you noticed that canned and bottled soda seems to taste different?
14:18You're not wrong.
14:20That's actually true, and there's even science behind it.
14:24Chemists say that aluminum cans have a polymer layer
14:27that absorbs some of the soda's taste,
14:29so cans indeed change the taste.
14:33Chemicals in a plastic bottle can add some acetyl-dehyde,
14:36a by-product that gets formed while plastic is melted, to the drink.
14:40So, they also change the taste a bit.
14:43You never really drink the original drink.
14:46If you want to try the real thing, buy sodas in glass bottles.
14:50When soda is stored this way,
14:53its taste is the most similar to the original one.
14:58Plastic bottles with soft drinks have five bumps on the bottom,
15:01and water and juice plastic bottles have almost flat bottoms,
15:05except for a little kink.
15:07It's not random.
15:08A plastic bottle is made by putting a plastic tube into a mold
15:12and blowing some air inside to make it expand until it takes the needed shape.
15:18The problem is that at the bottom,
15:20the bottle will always have an outward kink that will make the bottle unstable.
15:26To avoid it, some air is also pushed inward from the bottom,
15:31creating that small punt at the base of it.
15:33Flat bottle bottoms are common because they need less plastic to be made,
15:38but soft drinks and sparkling water need special treatment.
15:42These liquids have internal pressure that can push the plastic outward,
15:47messing up with the punt and the stable form of a bottle.
15:51So, soda bottles have a curved shape
15:54because this way they're more pressure-resistant.
15:58Compare folding a regular piece of paper to folding a paper too.
16:03The latter will have more resistance.
16:05In the same way, curved plastic is more resistant to any pressure.
16:11Take a closer look at your bag of chips.
16:14You can probably find these little colored circles.
16:17They're made by the manufacturer to test the print that is used on the package.
16:23They're called color control patches.
16:25The circles are not the same palette as the final package.
16:29They're layered on top of each other to achieve the final color of the bag.
16:34So, why do manufacturers need them again?
16:37Imagine that something is off and the printing machine prints a bunch of wrong packages.
16:42That's a lot of wasted money.
16:45So, these control patches are there to make sure that the final print is going to be correct.
16:50If they're off, the manufacturer will know that the whole package is going to be off too.
16:57These patches allow the printers to find a surplus or a deficiency of color and solve the issue.
17:03But don't worry if you don't find these circles.
17:06They probably just got cut off.
17:10Take a good look at a milk jug.
17:12There's often an inverted circle on one of the sides.
17:16This dimple is there to make the jug more resistant and to prevent it from rupturing if the jug falls
17:23on the floor.
17:23The dimple gives some more space for the liquid to expand.
17:28Also, as the expiration date approaches, the microbes in the milk start to expel some gases.
17:34As more and more of them get trapped inside, the pressure in the jug rises.
17:40The dimple accommodates the expansion and prevents the jug from bursting.
17:48Now, here's a trick.
17:50Instead of putting the box grater vertically on top of a plate, put it horizontally, with no plate underneath, of
17:56course.
17:56This way, you won't risk scraping your knuckles because only your fingertips will eventually touch the grater when you reach
18:02the end of the process.
18:03Also, it gives the grater more stability, when otherwise you'd have to balance the grater or even hold it in
18:09the air with the other hand.
18:11When you're done, or when there's just too much grated stuff on the bottom wall of the grater, simply turn
18:16it on its side to pour the contents into the bowl or plate.
18:20Flowers in a vase would stay fresher for longer if not for the bacteria that breed in the water.
18:25Since copper has some antibacterial properties, dropping a penny into the water will help keep the microbes at bay and
18:33let you enjoy your flowers for that little bit longer.
18:36An easy way to check if your bed linen has dried completely is to put a small mirror in between
18:41the layers for about 5 minutes.
18:43If the mirror has steamed up when you pick it up, it means the sheets are still a bit damp.
18:57If you have a not-very-healthy habit of eating in front of your computer, you'll be surprised at how
19:05much crumbs and grime there is inside your keyboard.
19:08Now, you can just turn it over and shake it vigorously, of course, but that's not very good for any
19:13piece of tech, you know.
19:15So, instead, take a post-it note and run its sticky part over the keyboard.
19:20It will collect the little pieces of trash like magic.
19:23Even a better way to do it, though, is to take a slime and stick it to the keyboard,
19:28then take it away, squeeze it, and stick again in another part.
19:31The slime will fill the entire space between the keys, and its sticky properties will let it gather every little
19:38bit of garbage.
19:39Separating egg yolks from whites is easier using a plastic bottle.
19:43Break the necessary number of eggs into a bowl, and then take an empty plastic bottle and squeeze it.
19:50Hold the bottle over the yolk and release.
19:52It'll pull in air and the yolk together, leaving the white in the bowl.
19:57Repeat with the rest of the yolks, and you're done!
19:59And that's no yolk!
20:02If you're tired of spitting out the stones when eating cherries or want to make a cherry pie, push the
20:07stones out with a straw.
20:09Also, many garlic presses have a special tool on their handle that can be used exactly for that.
20:15Cleaning a blender can be a nuisance if you do it manually.
20:19Instead, fill it with hot water and add some liquid soap or detergent, then run it for about 10 seconds.
20:25Rinse it afterwards, and it's clean.
20:27Plaster walls can crumble, flake, and spread dust all over the floor when you hammer nails into it.
20:33Cut a strip of masking tape and stick it to the place you want to hammer a nail in.
20:38The tape won't let the plaster crack and crumble, leaving the hole neat and clean.
20:43Small scratches and dents on wooden furniture can be removed with some toothpaste or a walnut.
20:49For toothpaste, rub a pea-sized amount of it into the scratch until it's gone, then wipe the leftovers with
20:56a damp cloth.
20:57For a walnut, take a half of that brain-shaped nut and rub it into the dent.
21:02Then rub the area with your fingers and buff it with a soft cloth.
21:06This'll help the wood absorb the oil from the nut, making the scratch sealed and gone.
21:11The sticky residue on jars left after you remove the stickers won't be easily removed by water and detergent.
21:18So, take some vegetable oil instead.
21:21Soak a cotton pad in it and wipe the sticky surface.
21:24Let it sit for a while and then wash the oil away together with the residue.
21:29If you can't comfortably reach the wick of a candle with a lighter, hey, take a stick of spaghetti.
21:35Light up its end, and you'll get a burning stick that's easy to use for hard-to-reach places.
21:41Now, next time your razor blade's getting dull, try rubbing it backwards on a pair of jeans for regular upkeep.
21:48Not while you're wearing them, of course.
21:50Make sure you keep the blades dry, too, or even kept in mineral oil.
21:54That'll stop them from rusting.
21:55Keep all those jelly, ketchup, peanut butter, and mayo fresher for longer in your fridge by turning the contents upside
22:03down.
22:04This creates a partial vacuum inside the container, helping prevent mold growth.
22:09Storing ice cream upside down will prevent freezer burn, too.
22:13To bring your permanent marker back to life, simply put a few drops of rubbing alcohol into the felt material
22:19inside and shake.
22:20Once the felt absorbs the rubbing alcohol for a couple of minutes, the marker will be almost as good as
22:26new.
22:27Now, don't keep throwing away lettuce that goes black too quickly.
22:31Covering it with a dry paper towel and then placing it in an airtight container will help it keep fresher
22:37for much longer.
22:38This goes for any leafy greens you've got leftovers of.
22:42That sharpish bit sticking out of the cap of your favorite cream is there for a reason.
22:47These tubes are usually sealed with foil, so unless you love breaking your nails trying to open them, just flip
22:53the cap over and push.
22:55Your bobby pins might not stay in place if the grooves aren't facing the right way.
23:00They should always be on the bottom, close to your head.
23:03Still coming loose?
23:05Well, put a squeeze of hairspray right onto the bobby pin before you put it in your hair.
23:10Now, your cotton rounds pack has those strings on it, so you can hang it on a handy hook in
23:15the bathroom.
23:16But there's no need to loosen and tighten it back up every time.
23:20Check out the bottom of the pack.
23:22It has a perforated line.
23:24Tear it open carefully, and you're good to go.
23:27Two zips too much?
23:29Maybe.
23:29But they come in handy as a clever anti-theft device.
23:32Just lock them together.
23:34Now, no one can open your backpack.
23:36Don't have a lock on you?
23:38You can also tie them together with some string, or even just a paper clip.
23:42Anything to slow those pickpockets down.
23:45That tiny little button on the back of a shirt collar is used to hold your tie in place.
23:50Hey, you don't want your tie trying to escape back there.
23:54Shoe manufacturers care about their customers.
23:57So, most running shoes now have a special anti-blister system pre-installed.
24:02Sounds intense, but it's basically just that extra hole on top of your sneakers.
24:07Make a loop with the extra hole, inserting the lace backward.
24:11Cross your laces and put them through the loops.
24:13Now, pull the laces down to lock your foot in place.
24:17Now, run.
24:18Yeah, go ahead.
24:20Car headrests are all about comfort, and detachable headrests are all about safety.
24:25If you pull the headrest out, you'll see two sturdy metal bars.
24:29If you ever get locked or trapped in your car, you can use the bars to smash the window and
24:34get out.
24:35If you've got some pesky parsley stuck in your teeth, try this tip.
24:39It can be hard to get it out with loose floss.
24:42You need more tension, so just tie it in a knot.
24:46It's not an accident that soy sauce bottles have two spouts.
24:50The sauce is liquid, and it flows out of the bottle pretty easily once you turn it over.
24:55Most Asian food lovers have spilled it at least once in a lifetime.
24:58That's why nowadays, restaurants prefer serving soy sauce in special bottles that have two spouts.
25:05This design allows you to control when and how much sauce will come out.
25:09Just put your finger on one spout when you pour the sauce through another.
25:13If you press your finger tightly to the spout, the sauce will stop flowing, and if you remove your finger,
25:19it'll flow again.
25:20And don't forget to ask your server,
25:23Hey, wasabi!
25:24Alright.
25:25A hair straightener is an excellent tool, not only for treating your natural curls, but also for fixing crumpled money
25:32or documents.
25:33You can also use a regular iron for this purpose.
25:36Just make sure you don't turn on steaming mode, otherwise there's a risk of damaging the paper.
25:42Hair bands are good not only for getting your hair done, but also to open a glass jar with canned
25:47food.
25:48Your hands might slip on the tightly closed lid, and if you don't open the can from the first attempt,
25:54your palms tend to get sweaty, making the task virtually impossible.
25:58So, put a hair band on the lid to fix your hand and make your grasp stronger.
26:03A simple rubber band will do as well.
26:05Now, it's time to take my sweaty palms and go.
26:09Okay, I know it's kind of cold to the touch, especially on a freezing winter's day.
26:13But did you know that brass doorknobs actually serve a purpose apart from looking classy and shiny?
26:18Since it's a copper alloy, brass has antimicrobial properties.
26:22That means it can help get rid of harmful germs and bacteria, sometimes in up to two hours.
26:28In high-traffic areas, that's all the more useful.
26:31But since brass is much costlier than other metals like nickel and steel,
26:35you barely see these types of doorknobs anymore nowadays.
26:39Speaking of lovely multi-purpose items, most screwdrivers have a tiny little secret of their own.
26:44They can sometimes be slid through a wrench so that they can be used to create more torque when twisting.
26:49Not to mention the uses when it comes to bolts in hard-to-reach places.
26:54There's a reason why buttons on women's shirts are for the left-handed, and it has nothing to do with
26:59fashion.
27:00This practice dates back to the times when chambermaids were helping ladies dress themselves,
27:05and it was easier for them to perform their job with this orientation.
27:09Having the buttons placed as such indicated a sign of wealth,
27:13so it's easy to imagine why the practice carried on, even though most people dress themselves nowadays.
27:19Next time you receive a package in your mail, take a look at your box cutter.
27:23If it features some diagonal lines on the blade, you're in for a little design perk.
27:28Turns out that these are blades that snap off.
27:31Continuously cutting cardboard can dull the sharp edge of the blade.
27:34To help prevent the need to buy a brand new box cutter,
27:37the top segment along the next line can be broken off to reach a new sharp edge.
27:42To do this, check out the small hole at the base of the tool, sometimes called the blade snapper.
27:48The people that first came up with this brilliant invention were engineers,
27:52inspired by the way chocolate bars are segmented.
27:55Hold on a minute, don't throw away the cardboard package just yet.
27:58Most likely, you'll have some silica gel packets somewhere at the bottom of the box.
28:03Since this gel is basically a drawing tool, it gathers up the moisture out of its environment,
28:07so you can store these packets for further occasions.
28:10Whether you'll need to dry out your phone or some other electrical object,
28:14you can place them in a container next to the silica gel to reduce the damage.
28:19You don't have to be a mechanic to know when a standard car tire needs replacing,
28:23since they come equipped with a neat indicator.
28:26Take a closer look, and you'll see that treads within the tire are a bunch of rubber notches.
28:32When the treads are evened out with the perpendicular bars,
28:35it's a sign you need to book an appointment with your local car service.
28:38Since most likely, the tires have lost most of their traction and may not be safe for driving any longer.
28:44The upper corners of a car windshield feature textured black dots melted into the glass edges.
28:50This neat add-on isn't there for design purposes.
28:54It's called Frit Glazing,
28:56which means that a special type of ceramic paint is added to the window for protecting its sealant from UV
29:02rays.
29:03It also conceals and creates a coarser surface for the adhesive used to set the window in place.
29:10Whenever you're up for a drive,
29:12check out if there's a small tab under your car's rearview mirror.
29:16Bet you didn't know it's there to help switch the mirror from daytime to nighttime views.
29:21It uses a prismatic glass technology to blur the reflection
29:25and reduce the glare of headlights behind you in traffic.
29:29People came up with these manually tilted mirrors in the 1930s,
29:33but they became standard somewhere in the 1970s.
29:37While you're in the car,
29:38check out the headrests,
29:39as you most likely don't know that they carry a little disguised purpose.
29:43Of course,
29:44they're adjustable to accommodate passengers of any height
29:47so that they get the proper support for their heads and necks.
29:50The hidden feature is that they are detachable
29:52and come with two very solid metal bars.
29:56Should you ever find yourself stuck in a car and need to make a fast getaway?
30:00These bars come in handy to crack out the car windows.
30:04So you're out for a drive and you're suddenly out of gas.
30:07What I'm about to describe sounds more like a meme than an actual situation bound to happen.
30:12But what if you're in such a hurry that you accidentally drive off
30:16with the gas nozzle still in the tank?
30:18Well,
30:19the nozzles have been designed to prevent any hazards from happening,
30:23rest assured.
30:23They feature a breakaway device that will allow the hose to separate when taken out with enough force.
30:30Initially designed in the early 20th century to be worn exclusively by basketball players,
30:35sneakers soon became one of those fashion fundamentals,
30:38similar to jeans and leather jackets.
30:41If you take a closer look at them,
30:42you'll see they have two extra holes on the side,
30:45similar to the shoelace holes.
30:47They're manufactured as such,
30:48not only to provide extra ventilation,
30:51but to allow people to get extra creative with their laces when wearing the shoes.
30:55Admit it,
30:56you've always thought that chopsticks are merged at the end for the sole purpose of keeping them together
31:00until you're ready to dig into your meal.
31:03That may or may not be the whole truth.
31:05Under a more detailed inspection,
31:08the wooden tools feature a square-shaped end.
31:10Chopsticks manufactured like this date back to an old Japanese traditional design,
31:15which can help with breaking the ends easily.
31:18The separated end can then be used as a resting block for the chopsticks
31:22to keep it more sanitized in hopes it can be used again,
31:25since they won't be touching the table or any other surface.
31:29Women's bikes have a special design,
31:31which, surprisingly, has a historical and fashionable purpose.
31:35The lower frame is for the most part meant to make up for the generally shorter height of ladies,
31:40compared to that of the average gentleman.
31:43While that is the case for handlebars and saddles,
31:46the overall frame is lower for an additional purpose.
31:49Way back when women wore long skirts and dresses all day,
31:52every day they needed to make sure their outfits wouldn't get caught in the frame.
31:57That's how we came up with a lower-framed bicycle,
31:59perfectly made for women and their needs at the time.
32:03The fact that toothpastes are multicolored
32:06is not just a nice perk to make dental hygiene more fun.
32:09There's a secret meaning related to each of the colors,
32:12which dates back to the 1970s.
32:15In those days, people grew more and more interested in their oral health care,
32:19and as such, they were looking for products which could do more than merely clean their teeth.
32:25One company was the pioneer in that regard,
32:28adding mouthwash to its toothpaste, meaning the blue strip.
32:31They later added on the red strip,
32:34meant to feature ingredients which helped with gum care.
32:37Speaking of toothpaste,
32:39check the cap next time you open a new tube.
32:41You may be in for a little surprise.
32:43There's a pointed cone shape inside the cap,
32:46so you can puncture the seal of the toothpaste without cutting yourself or ruining your manicure.
32:51Not to mention, it's more hygienic since you won't be able to transfer germs
32:54or other bacteria into the product itself.
32:58On the subject of bathroom countertop items,
33:01toothbrushes come with a neat add-on hidden in the bristle patterns.
33:05Apart from making the toothbrush look cooler,
33:07they also do come with a practical purpose.
33:10Most toothbrushes come with a pattern of blue bristles intertwined with white ones.
33:14The blue dye is meant to fade out,
33:17signaling the time when you need to replace your toothbrush.
33:21Dentists say that toothbrushes should be replaced every 3 to 4 months,
33:25but it does serve as a great reminder in case you forget.
33:28Still love playing with Lego?
33:30Don't judge.
33:31Hey, it's a great hobby for all ages.
33:33Notice there's a hole on top of the Lego heads?
33:36Behold, you're looking at a safety feature that the people at Lego
33:39designed to prevent choking hazards.
33:42The most dangerous issue should a person swallow any of these pieces
33:46is the blocking of the airways.
33:48Designing a hole inside the Lego head
33:50helps the air to flow freely through the piece
33:53until it can be removed safely.
33:55We're now used to all sorts of modern light bulbs,
33:58some tubular, some shaped like diamonds,
34:01and some even twisted all together.
34:04Historically, light bulbs were round
34:06and the initial shape served a purpose in itself.
34:09It was mainly connected to the fact that glass bulbs were hand-blown,
34:13which gave them the round shape to begin with.
34:15The hidden practical reason
34:17was that the light bulb filament
34:18needed to be at the same distance
34:20from every surface of the glass sphere.
34:22The easiest way to achieve this
34:24was to make the glass in the shape of a globe.
34:28You just spent the entire morning
34:30running errands up and down the street,
34:32and you finally stopped to treat yourself
34:34to a cup of coffee.
34:36You enter the nearest coffee shop,
34:38place your order,
34:39and notice that actually
34:40you really need to use the bathroom.
34:43It's a regular-looking public one
34:45with multiple stalls.
34:46As you pick yours,
34:47the one in the middle,
34:48you get inside,
34:49and your mind starts to wander.
34:52Why on earth do bathroom doors
34:54have a half-inch gap
34:55between the door and the lock?
34:56And why on earth
34:57do they have a huge gap
34:59between the door and the floor?
35:01Can we have a drumroll
35:02for this moment, please?
35:04Well, my friend,
35:05there is not only one specific reason
35:07why public bathroom doors
35:08have so many gaps in them,
35:10but rather several.
35:12Public toilets are designed
35:13to make people spend
35:14as little time there as possible.
35:16You aren't supposed to feel comfortable
35:18or at home.
35:19So the design would have to reflect this notion.
35:22Here come the gaps.
35:24In some bathrooms,
35:25gaps are so big
35:27that users may even feel self-conscious
35:29about doing their business
35:30out of preoccupation
35:32that the rest of the people
35:33standing in line will see them.
35:35Then there's the matter of pricing.
35:38Making custom doors
35:39can be a heavy burden
35:40for the people building public toilets.
35:42This would mean
35:43understanding exact measurements
35:44so that doors would always fit
35:46the mold of the stalls
35:47it's supposed to be installed into.
35:49Now, not all the gaps
35:51in public bathrooms
35:52are necessarily the same size.
35:55They may vary,
35:56even if this variation is small
35:58and often unnoticeable.
35:59So these gaps actually help
36:01to reduce the margins of errors
36:03and to turn production
36:04more cost-effective
36:05for the people financing them.
36:07In case a door comes wider
36:09or more narrow than it should,
36:11the gap regulates the differences
36:13and allows for their installation anyway.
36:15There is also the case of air circulation.
36:18The last thing you want to do
36:20in a public bathroom
36:21is to trap odors.
36:23So you need a little space
36:24under and between the doors
36:26to allow the air to flow.
36:28Finally, the gaps are a big safety measure.
36:31It can always allow for people
36:32on the outside
36:33to see if someone inside a stall
36:35isn't feeling too okay
36:36and maybe need some help.
36:39And what about that extra hole
36:41in the upper part of the sink?
36:42It has a name in everything.
36:44The overflow hole.
36:45And it's designed
36:46to keep the sink from flooding.
36:48So in case someone forgets
36:50and keeps the faucet going for too long
36:52or the sink gets clogged
36:54and water can't drain down
36:55from the main drain hole,
36:57the overflow hole comes in
36:59to save the day.
37:00Let's say it buys you a little time
37:02before you have
37:02the entire bathroom floor flooded.
37:04Have you ever noticed
37:06how satisfying
37:07closing the door of a car can be?
37:09Car manufacturers devote
37:10a great deal of time
37:12to designing these sounds.
37:14Studies have shown
37:14that they create
37:15a perceived sense of quality
37:17in the buyer.
37:18It all begins
37:19with the primary material.
37:20While older cars
37:22used to be made
37:22with heavier materials,
37:24car doors nowadays
37:25are produced with lighter tin,
37:27which can make
37:28a rather unpleasant metallic sound
37:30once you shut them closed.
37:31So car companies
37:33employ sound engineers
37:34to ensure
37:35that there is the exact amount
37:36of foam, mats,
37:37and tin
37:38in a car's composition
37:39to make the most comforting
37:41sound possible.
37:42And what about
37:43those tiny dots
37:44on the top
37:45of your car's front window?
37:46The pattern
37:47of these little black dots
37:48minimizes distractions
37:50for your eyes.
37:51This black part,
37:52also known as frit,
37:54normally gets warmer
37:55than the clear parts,
37:56which prevents
37:57the windshield
37:57from deforming.
37:59And no,
38:00the tab under
38:00your rearview mirror
38:01is not made only
38:02for the purpose
38:03of hanging fluffy dice
38:04or aromatic-pleasing
38:06air fresheners.
38:07It's actually a switch
38:08that allows you
38:09to adjust the position
38:10of the mirror
38:10depending on the time of day.
38:12Flip it one way
38:13and it's the daytime
38:14driving mode.
38:16Flip the other
38:16and you're ready
38:17to drive safely
38:18during nighttime
38:19as it tones down
38:20the glare
38:20coming from headlights
38:22of the cars behind you.
38:23Next time you head out
38:25to the supermarket,
38:26make sure to keep
38:26this in mind.
38:27In case you don't have
38:28a coin to unlock
38:29these shopping carts,
38:30there is a well-kept secret
38:32that can help you out.
38:33If you have
38:34your house keys on you,
38:36check for a rounded key head.
38:38If you happen to find one,
38:39try using it
38:40to unlock the cart.
38:41It should fit
38:42perfectly in there,
38:43replacing the need
38:44to carry coins around.
38:45Because,
38:46if we're being honest,
38:47who still has them?
38:49Elevators.
38:50If you want to ride them
38:51on your terms
38:52and your terms only,
38:53make sure to try
38:54something out.
38:55Most elevators
38:56have a secret
38:56button combination
38:57you can use
38:58to skip all
38:59the other selected floors
39:00and go directly
39:01to the one
39:02of your choosing.
39:03This might work out,
39:04especially on those days
39:05when you've pressed 13.
39:07But you wanted
39:08to press 33.
39:09On most elevators,
39:11this works
39:11once you simultaneously
39:12press the closed door button
39:14together with your floor number.
39:16This should help you
39:17get to your floor
39:18without stopping.
39:19Some elevators require you
39:21to double-press
39:21the selected floor numbers,
39:23as double-pressing
39:24will often cancel
39:25the previously made request.
39:27While other elevators
39:28require you
39:29to hold the
39:30open door button
39:31and then double-press
39:32the buttons
39:32of the floors
39:33you'd like to cancel.
39:34Now,
39:35to stay out of trouble,
39:36it's best not to cancel
39:37the floors
39:38of the other people
39:39in the elevator.
39:40They won't take it kindly.
39:42Also,
39:42keep in mind
39:43that there are elevators
39:44that might not have
39:45this function.
39:46Now,
39:46for honey lovers
39:47out there,
39:48go ahead and raise your hand.
39:49If your pot
39:50of golden honey
39:51is crystallized,
39:52know that it is
39:53actually a good sign.
39:55Crystallized honey
39:56means that it hasn't
39:57been pasteurized,
39:58which means
39:59better product quality.
40:00With a decrease
40:01in temperature,
40:02the natural ingredient
40:03of honey,
40:04also known as glucose,
40:06will make it crystallize.
40:07Now,
40:08try making the best of it.
40:09To add some texture
40:10to your oatmeal or toast,
40:12add a layer
40:13of crystallized honey
40:14and enjoy nature's sugar.
40:16And if you don't
40:16like crystallized honey,
40:18plop it in the microwave
40:19for a minute or two.
40:20Ah,
40:21winter and fall.
40:23You know what
40:23this means, right?
40:24Sweater weather.
40:25But there's nothing
40:26more annoying
40:27than wearing
40:27your beautiful wool sweater
40:29and itching yourself
40:30all the way through it.
40:32Actually,
40:33I can be more annoying
40:34than that,
40:34but let's talk
40:35about itchy sweaters.
40:36To keep this
40:37from happening again,
40:38here's the secret.
40:39Turn your sweater
40:40inside out
40:41and soak it
40:42in cold water.
40:43Add two or three
40:44tablespoons of vinegar
40:45and let it sit
40:46for a while.
40:47Then,
40:48drain the water.
40:49Now,
40:49while the sweater
40:50is still wet,
40:51massage a generous amount
40:52of hair conditioner
40:53into the fibers
40:54of the wool.
40:55After letting it soak
40:57in the hair conditioner
40:57for about 30 minutes,
40:59gently press the excess water
41:01out of the wool
41:02and leave it
41:02to dry flat
41:03on a towel.
41:04There you go!
41:05No more itchy sweater.
41:07Any fast food restaurant
41:09you go to
41:09will hand out
41:10small paper cups
41:11for customers
41:12to fill
41:13with their ketchup,
41:13mustard,
41:14or barbecue sauce.
41:15But if you're eating
41:16some chicken nuggets
41:17or trying to dip
41:18your burger
41:19into the cup,
41:20there's always
41:20that bit of sauce
41:22that seems impossible
41:23to reach.
41:24Next time,
41:25try unfolding the cup.
41:26It'll turn into
41:27a small paper plate
41:29and this way,
41:30you'll get all the ketchup
41:31you poured
41:31in the first place.
41:33Padlocks used
41:34in outdoor environments
41:35should be clean
41:36and lubricated
41:37every three months.
41:39Regular lubrication
41:40will help prevent padlocks
41:42from freezing
41:42in cold weather conditions.
41:44Look for the tiny hole
41:45on the bottom
41:46of the lock.
41:47Then,
41:47pour oil into it
41:48and there you go,
41:50it opens again.
41:51One thing we often neglect
41:53is a point
41:54in an ointment cap.
41:55These pointy surfaces
41:57were designed
41:57to help us
41:58break the tinfoil
41:59protection
41:59of the ointment tube.
42:01You just turn the cap over
42:02and break the ointment seal
42:04with its own cap
42:05and there you go.
42:07After a long day of work,
42:09all you really need to do
42:10is a bubble bath.
42:11You turn on the hot water
42:13and let it run
42:13for a few minutes.
42:14You might even light a candle
42:16and pour some essential oils
42:18into the water.
42:19Then,
42:19in comes the liquid soap.
42:21You stir the water
42:23until the entire surface
42:24of the tub water
42:25is crammed with bubbles
42:26and make your way in.
42:28The bubbles
42:29in a bubble bath
42:30have a fundamental
42:31primary function.
42:32Their job
42:33is to preserve
42:33the water's temperature
42:34just so you can have
42:36warm water
42:37for longer.
42:37Do you have sweaty feet?
42:39Weird question,
42:40I know.
42:41But if you're one
42:42of these people,
42:43here's some good news.
42:44All is not lost.
42:46Try putting a dry teabag
42:48inside your shoes
42:49and storing it
42:50in a dry place
42:51for a while.
42:52The teabags
42:52will absorb
42:53the humidity
42:54and the smell
42:55off the soles
42:55of your shoes.
42:56So,
42:57here I am thinking,
42:58shouldn't we have learned
42:59these things in school?
43:00Well,
43:01either way,
43:02if you learned
43:02something new today,
43:03make sure to tell us
43:04about it in the comments below.
43:14Have a good look
43:14at the front
43:15of your sweatshirt.
43:16Okay,
43:16let's ignore
43:17the pizza stains for now.
43:18Ever notice
43:19that V-shape
43:20right at the bottom
43:21of the collar?
43:21That small V-patch
43:23isn't just a decoration,
43:24it serves more
43:25than one purpose.
43:26Made from a double layer
43:27of webbing material,
43:28just like waistbands
43:29and cuffs,
43:30these inserts
43:31allowed the wearer
43:32to put on the sweater
43:33without losing
43:33any shape over time.
43:34As the sweatshirt
43:36would be pulled down
43:37over the head,
43:38the V-insert
43:39would stretch and flex
43:40to allow a lot
43:41of wiggle room.
43:42The other benefit
43:42the V-pattern gives
43:43is to absorb
43:44all that sweat.
43:45The chest
43:46is a major area
43:47of perspiring.
43:48Just look at soaked shirts
43:50after doing something physical.
43:51Although,
43:52the V-insert
43:53can only take so much.
43:55That extra pocket
43:57on the right side
43:57of a suit jacket
43:58is called
43:58the ticket pocket.
44:00They used to store coins
44:01for people on horseback
44:02to pay tollboots
44:03without opening
44:04their jackets.
44:05When train travel
44:06became more popular,
44:07they were perfect
44:08for tickets and passes.
44:09As for the left chest pocket,
44:11it's used to store
44:12handkerchiefs,
44:13keeping them away
44:14from the other
44:14cluttered and dirty pockets.
44:16Metallic zippers
44:17have a hidden lock
44:18built in.
44:19Next time you've put on
44:20a pair of pants,
44:21shorts,
44:21or skirt,
44:22never leave the zipper handle
44:24in an upward position.
44:25Push the little zipper tab
44:26downwards,
44:27and it'll automatically lock.
44:29To mute your
44:30annoying beeping microwave,
44:32look closely
44:32at the front panel
44:33for a sound button.
44:34It may have been there
44:35all along,
44:36just begging to be pressed.
44:38If there's no button,
44:39try pressing and holding
44:401,
44:410,
44:42stop,
44:42or cancel.
44:43It will either result
44:44in turning off
44:44the beeping sounds
44:45or activating
44:46a lock feature.
44:47Of course,
44:48if your microwave
44:49doesn't have
44:49any mute function at all,
44:51you'll just have to
44:52keep running
44:52to stop the timer
44:53late at night.
44:54Nintendo Switch cartridges
44:56have a hidden safety function
44:57and it's going to leave
44:58a bad taste in your mouth.
45:00Although non-toxic,
45:02denotonium benzoate
45:03coats the cartridge
45:04in a sour, peppery,
45:05and bitter substance
45:06to prevent kiddos
45:07from swallowing them.
45:09This chemical compound
45:10is one of the most
45:11bitter flavors
45:11known to humanity,
45:13commonly used
45:13to keep people
45:14from consuming things
45:15they're not meant to.
45:16There's not much privacy
45:18while using a public toilet,
45:19especially when the door
45:21doesn't reach the floor
45:22at all.
45:22But these gaps
45:23are there for emergency access
45:25in case the person inside
45:26needs immediate help.
45:28The gap also works
45:29for ventilation,
45:30thank goodness,
45:31and to stop people
45:32from lingering
45:33around the toilet
45:33too long.
45:35Toothpicks have a built-in
45:36holder to prevent you
45:37from just leaving them
45:38on the table.
45:39Just break off the top,
45:40it's that simple.
45:41Place that on your table
45:43and your toothpick
45:43between the notches,
45:45pointy end up, of course.
45:46Now, it won't touch the table
45:48and get all dirty.
45:49You can do the same
45:50with disposable chopsticks.
45:51Break off the top piece
45:53before you pull them apart.
45:54Those tiny dimples
45:56on golf balls
45:56actually give
45:57a greater lift
45:58to the ball
45:58and reduce air resistance,
46:00meaning the ball
46:01can go further with them.
46:02These dimples
46:03come in spherical
46:04and hexagonal shapes
46:05with each slightest change
46:07affecting the ball's performance.
46:09So, choose them carefully.
46:11Plastic wrap boxes
46:12have hidden little holders
46:14that stop the roll
46:15from jumping out of the box.
46:16They're little cardboard tabs
46:18on the sides
46:19that lock into the tube inside
46:20while making it easy
46:22to glide the film out.
46:23Just push them in
46:24and never be frustrated again.
46:26Gosh, I wish that would work
46:28with other stuff.
46:29The seven spikes
46:30on top of the Statue of Liberty's crown
46:32don't represent the seven seas
46:34and the seven continents at all.
46:36They're representing
46:37the sun's rays,
46:38giving a halo
46:39to show that she is divine.
46:41In the United States,
46:4312 different Federal Reserve Banks
46:45print all the money.
46:46So, if you want to know
46:47where your money comes from,
46:48just look for these small codes.
46:51A1, Boston.
46:52B2, New York.
46:53C3, Philadelphia.
46:55D4, Cleveland.
46:56E5, Richmond.
46:58F6, Atlanta.
46:59G7, Chicago.
47:01H8, St. Louis.
47:03I9, Minneapolis.
47:04J10, Kansas City.
47:06K11, Big D, little a, double LAS.
47:09It's a song.
47:10L12, San Francisco.
47:13Never call it Frisco.
47:14Meanwhile, the bristles
47:16on the side of every escalator
47:18are in place to encourage people
47:19to stay away from the edge,
47:21meaning they're less likely
47:22to face a mishap
47:23with a trapped bag or shoelace.
47:25Did you hear about the octopus
47:27caught on the escalator?
47:28It was a stretch.
47:29Old-fashioned pin cushions
47:31that are large tomato
47:32with a strawberry attached
47:33are more than a place
47:35for your needles.
47:36The strawberry contains
47:37an emery board.
47:38When you stick your pins
47:39and needles into the strawberry,
47:41the emery board
47:41keeps them rust-free
47:42and sharpens them as well.
47:45Some people still forget
47:46to engage the hose
47:47from their car
47:48after filling up with gas.
47:49Luckily, a lot of gas companies
47:51realize this,
47:52so if you happen to drive off
47:54with a hose
47:54still attached to your car,
47:56there's a magnetic connector
47:57that disengages when pulled.
47:59Those different colored bread tags
48:01use a color-coded system
48:02to show the day
48:03that they were baked.
48:04They are usually
48:05blue tags for Mondays,
48:07green tags for Tuesdays,
48:09red tags Thursdays,
48:10white tags Fridays,
48:11and yellow tags for Saturdays.
48:13On the back
48:14of most beauty products,
48:16you'll find a small symbol
48:17on the back
48:18that indicates
48:18how long it'll stay good for.
48:20For example,
48:212M means two months
48:23after opening.
48:24Some jackets
48:25have those extra flaps
48:26with a button on the shoulder,
48:28and they actually have a use.
48:30These are perfectly designed
48:31for holding your purse,
48:32backpack,
48:33or bag in place
48:34and secure.
48:35Pom-poms on the top of beanies
48:37were never just
48:38a fashion statement.
48:39They were for protection,
48:40placed on top of the headwear
48:42to protect sailors
48:43from accidentally
48:44hitting their heads
48:45while moving around
48:46on a ship.
48:47Pom-poms touch the roof,
48:48so don't go any higher.
48:50They don't appear
48:51on every type
48:52of measuring tape,
48:53but diamonds
48:54or black circles
48:55are there to help contractors
48:56measure the proper placement
48:58of studs in a wall.
48:59Those little holes
49:01on your baseball cap
49:02aren't some fashion trends
49:03that stuck around for years
49:05and have never been changed.
49:06These holes are actually
49:07called eyelets,
49:08and they're to keep your head
49:10well-ventilated,
49:11not for appearance.
49:12If you have YKK
49:14printed on your zipper,
49:15they're not some secret code
49:17to be cracked.
49:17Those three letters
49:18appear on so many zippers globally
49:20because they're the symbol
49:22of the world's most universal
49:23zipper manufacturer,
49:25the YKK Group.
49:27Every can of soda
49:28comes with a tab
49:29for easy opening
49:30of the tasty beverage,
49:31and every single one of them
49:32has a relatively large hole
49:34in the top.
49:35While it can make it easier
49:36to get your finger
49:37under the tab
49:38to get your soda,
49:39its intended purpose
49:40is a straw holder.
49:42Spin the tab
49:43over the opening
49:43and place your straw
49:44through it
49:45to secure it in.
49:46Disposable lids
49:47do a great job
49:48of keeping your drink
49:49inside the cup,
49:50but that's not
49:51its only purpose.
49:52When you're ready
49:53to sip on your drink,
49:54the lid has specially
49:55designed ridges
49:56to double it as a coaster
49:57and hold on to the bottom
49:59of your beverage tightly.
50:00The tiny black dot
50:02between the lens
50:03and the flash
50:03on the back of your iPhone
50:04is actually
50:05for a great purpose.
50:06It's the third microphone
50:08to provide superior
50:09sound quality
50:10by eliminating
50:11background noises
50:12and to pick up
50:13your voice much clearer
50:14in a crowded environment.
50:16Gas cans
50:17that have two holes
50:18with caps
50:18aren't there
50:19to fill different
50:20sized equipment.
50:21The second hole
50:22is meant to be uncapped
50:23before you pour your gas
50:25to prevent that
50:26glugging effect.
50:27By allowing more
50:28airflow through,
50:29the smoother the gas
50:30will pour out.
50:31That little arrow
50:32next to the gas symbol
50:33on your car's dashboard
50:35shows you
50:36which side
50:36your gas tank is on.
50:38It'll help you
50:39when you go fill up
50:39your gas tank,
50:40especially if you're
50:41borrowing a different car
50:42than your own.
50:44Look at a check
50:45and see MP
50:46near the signature line.
50:47That means
50:48the check printer
50:49used microprint
50:50as one of the check
50:51security features.
50:52The lines look like
50:53a regular line
50:54to the untrained eye,
50:55but they're words
50:56like the bank's name,
50:58authorized signature,
50:59United States government,
51:00or even
51:01original document.
51:02That little disc
51:04that's underneath bottles
51:05isn't just a leftover
51:06part of the production
51:07process.
51:08It creates an even
51:09tighter seal
51:10with the lid.
51:11So, even if
51:12the bottle was turned
51:13upside down,
51:14the liquid doesn't
51:14leak out everywhere.
51:16The plastic disc
51:17keeps carbonated sodas
51:18carbonated for longer
51:19with this seal.
51:20The indent
51:21in the bottom
51:22of wine bottles
51:23is called a punt.
51:24But it's not just
51:25something to help
51:26you hold on to the bottle.
51:27The punt makes
51:28the wine bottle stronger,
51:30so if dropped,
51:31the cork won't fly
51:31across the room
51:32with all that pressure.