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Think you know the real purpose of everyday objects? These hidden features and secret functions will make you see common items in a totally new way. Discover 47+ everyday objects you’ve probably been using wrong for years. Unlock clever design details, surprising uses, and simple life hacks you’ll wish you knew sooner.
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FunTranscript
00:00So, grocery carts have loops for a reason.
00:03You don't want to put your jacket in your cart next to a bunch of potatoes and onions, do you?
00:08Hang it on the loop instead.
00:10It's there to help you organize your cart better.
00:13Carts also have a cool section at the bottom.
00:16Whenever your cart's full, just lift it up and attach a shopping basket for extra purchases.
00:21Lift up the whole metal thing,
00:23sit your basket on the horizontal bar above the wheels,
00:27and secure it with those handy hooks.
00:30If you've got some pesky parsley stuck in your teeth, try this tip.
00:34It can be hard to get it all out with loose floss.
00:37You need more tension.
00:38Just tie it in a knot.
00:41Toothpaste stripes may seem a bit weird.
00:43It's just a marketing trick.
00:45Back in the 70s, a leading toothpaste brand added a blue stripe
00:50to show that their toothpaste had double action.
00:53Solid white toothpaste worked just as well.
00:55But those blue bristles on your toothbrush actually make sense.
01:01They gradually lose their color over time.
01:04When the blue's faded, it's time to change your toothbrush.
01:08Ever notice that tiny hole on the bottom of a padlock?
01:12Its hidden purpose is to drain water out to keep it from rusting.
01:16It's also the place to lubricate a padlock.
01:19A drop of oil in there will make it open and close way easier.
01:23Those ridges on the edge of dimes aren't just for show.
01:27People used to shave off the edges, then melt the edges down into new coins.
01:32But thanks to the new design, it's easy to tell if someone's been shaving the edges off.
01:38If you still struggle with peeling an orange, here's another way of opening it.
01:43First, cut off the top and bottom.
01:46Make a slit on the side and pull it open.
01:49That knobbly bit sticking out of the cap of your favorite cream is there for a reason.
01:54These tubes are usually sealed with foil.
01:57So, unless you love breaking your nails trying to open them,
02:00just flip the cap over and push.
02:03The tiny rubber disc under every bottle cap isn't just for seeing if you want a lifetime supply of soda.
02:11It's what keeps your drink all nice and bubbly.
02:13The lid keeps the liquid inside.
02:16The rubber disc keeps the gas inside.
02:19Until you drink it.
02:21If you use the blue side of your eraser to erase pen,
02:25your notebooks are probably all full of holes.
02:28The blue side's there for when you need to erase something on much thicker paper.
02:32It works on pencil and even ink, as long as the paper's thick enough.
02:37Your bobby pins might not stay in place if the grooves aren't facing the right way.
02:42They should always be on the bottom, close to your head.
02:46Still coming loose?
02:47Put a squeeze of hairspray right onto the bobby pin before you put it in your hair.
02:53Many glass bottles usually have some sort of indent at the bottom.
02:58It's handy if you want to be fancy.
03:00Put your thumb in the indent and pour away.
03:04The technical name for this little dude is a punt.
03:07Those sugar sticks at your local coffee stand are ready to be opened in a new and easier way.
03:14Look how happy they are!
03:15Try splitting it right down the middle.
03:18No more sugar on your fingers.
03:20No more tiny little paper bit.
03:22Even your coffee's happier.
03:23Your cotton rounds pack has those strings on it, so you can hang it on a handy hook in the
03:29bathroom.
03:30But there's no need to loosen and tighten back up again every time.
03:35Check out the bottom of the pack.
03:37It has a perforated line.
03:39Tear it open carefully, and you're good to go.
03:43Doorknobs are usually made of brass, bronze, or some other copper alloy.
03:47Why?
03:48They're antibacterial, so they stop microbes from spreading.
03:52Just a couple of hours, and the pesky microbes are gone.
03:56But don't forget to wash your hands anyway!
03:59Bottles have long necks for a reason.
04:02Hold the neck, not the bottle, if you want to enjoy a cold drink.
04:07Two zips too much?
04:08Maybe.
04:09But they come in handy as a clever anti-theft device.
04:13Just lock them together.
04:14Now, no one can open your backpack.
04:17Don't have a lock on you?
04:19You can also tie them together with some string, or even just a paper clip.
04:23Anything to slow those pickpockets down.
04:27That tiny little button on the back of a shirt collar is used to hold your tie in place.
04:32You don't want your tie trying to escape back there.
04:36Shoe manufacturers care about their customers.
04:38So, most running shoes now have a special anti-blister system, pre-installed.
04:45Hmm.
04:45Sounds intense, but it's basically just that extra hole on top of your sneakers.
04:50Make a loop with the extra hole, inserting the lace backwards.
04:55Cross your laces and put them through the loops.
04:57Now, pull the laces down to lock your foot in place.
05:02Now, run!
05:04You'll find silica gel packets when you buy bags, shoes, even some snacks.
05:09Don't throw them away.
05:11They soak up excess moisture.
05:13So, any times your shoes are a bit damp, chuck a few gel packets in there overnight.
05:19You might have been using your shampoo wrong this whole time.
05:23Really?
05:23Here's the gist.
05:25Don't apply it to your hair.
05:27Just apply it to the roots.
05:28The foam you create will trickle down on your hair anyway.
05:33Notebook margins aren't for taking extra notes or practicing emojis.
05:37They were invented to protect people's work.
05:40People used to live with a lot of hungry rats around.
05:44The rats would nibble at the paper, eating people's work.
05:47They put the margin lines there to let people know to start their writing further from the edge,
05:52so it's not lost to a hungry rodent.
05:55Solo cups are the key element for any barbecue party.
05:59But these red cups are even cooler than you thought.
06:02You can use them to measure liquids.
06:05The bottom line equals 1 ounce, the second line equals 5 ounces, and the third line equals 12 ounces.
06:13If you like milk on your tea, try this tip out next time.
06:17Pour it from the other side of the carton.
06:19It sloshes around less, and it's easier to control.
06:24Car headrests are all about comfort, and detachable headrests are all about safety.
06:29If you pull the headrest out, you'll see two sturdy metal bars.
06:34If you ever get locked or trapped in a car, you can use the bars to smash the window and
06:39get out.
06:41Women's shirts have their buttons on the left, even though about 85% of people are right-handed.
06:47It would make way more sense to have them on the right.
06:51The thing is, back in the day, wealthy women had maids to help them dress.
06:56So, for them, the buttons on the left made things much easier, don't you know?
07:03The tab on your rear-view mirror does have a real function, people.
07:07It holds your air freshener, your huge fuzzy dyes, maybe a big smiley emoji.
07:13But it's actually a switch between day and night mode for your mirror.
07:17When it's dark out, the night mode blocks the glare from the car behind you.
07:23The McFlurry spoon has a square handle on it.
07:26It gets attached directly to the ice cream machine, and the ice cream and toppings get mixed in together, right
07:32in your cup.
07:33It saves the employees loads of time, plus it saves water, because they don't have to wash the machine after
07:39each one.
07:41Wooden hangers are so hot right now, they could burn up your clothes.
07:46Nah, not really, but they look better and are more natural.
07:49But there's another reason to use them.
07:52They're made of cedar, which is a natural moth repellent.
07:55Bonus tip?
07:56Add some dry orange peel to your closet.
07:59No moth is ever going in there again.
08:03So, you hungry, but not quite ready to eat a three-course meal just yet?
08:08How about some instant noodles instead?
08:11Ah, the water's boiled, your tummy's rumbling, but there's a problem.
08:15The styrofoam cup's broken, and the noodles are exposed.
08:19Wait, is that a space at the bottom of the cup?
08:22Why?
08:23That space is for protecting the noodles.
08:25It's not the company trying to save money or anything.
08:28Notice how the ramen in cups is hardly ever broken, but the one in the packet comes out looking like
08:33a mess?
08:34This technique is called a middle suspension.
08:37The noodles are packed in tightly to stop them from getting crushed in the delivery truck.
08:41It's not just about the noodles looking nice and long.
08:45It also helps those tasty noodles soften more easily.
08:49Now, morning breath isn't the best.
08:51Luckily, there's an easy way to get rid of it.
08:54Yeah, it would have been easy to think that mouthwash was invented for, you know, watching your mouth.
08:59Well, mouthwash was originally invented and sold as a floor cleaner.
09:04It was sold to hospitals as an antiseptic for years.
09:08It never really took off.
09:10Some genius in marketing rebranded it as a mouthwash.
09:13And the rest is minty fresh history.
09:16So, after you've cleaned your teeth, just remember, rebranding can be pretty powerful.
09:22It's hard to imagine a world without the internet these days.
09:26No streaming, no online games, or pictures of cute little kitties.
09:30Yeah, that's not what it was designed for.
09:32But who cares, right?
09:34The prototype internet was called ARPANET, or the Advanced Research Projects Agency Network.
09:41This machine was very sensitive.
09:42To stop anyone from turning it off, some clever scientist stuck a piece of paper on it with these powerful
09:48words.
09:49This machine is a server.
09:51Do not power it down.
09:52It was written in red ink.
09:54Hey, nice touch.
09:56Having your professor scribbling in the margins of your notebook isn't exactly new.
10:01Except that margins weren't designed for that.
10:04They're rat protection.
10:06Back in the day, rats would nibble on paper all the time.
10:09So, if you wrote something on the edge of the paper, it ended up inside a hungry rat.
10:14A couple of well-placed lines stopped your best answers from getting eaten.
10:20Hey, I can't finish this pizza.
10:22Time to cover up those leftovers.
10:24Luckily, I have plenty of plastic wrap.
10:27A little tug, and the roll just jumped out.
10:30Prison break!
10:31If you look at the wrap's home, the long, thin box, there's a special little feature that can help you.
10:37A cardboard tab on each end.
10:39Push them in, and the roll's not going anywhere.
10:43Strange that I've never seen them before.
10:47It's lunchtime.
10:48I'm feeling like a California roll today.
10:51Seaweed, rice, cucumber, avocado, and crab meat.
10:55Or is it?
10:56It's actually imitation crab meat.
10:58It's basically cheap white fish blended with sugar.
11:02The fish mixture is then heated and pressed into shape.
11:05Mmm, yummy!
11:07That's maybe why it's called the hot dog of the sea.
11:10Nah, I just made that up.
11:13Your microwave has a secret we've all seen, but never paid attention to.
11:18That black mesh you see on the door is a Faraday cage.
11:22It stops the electromagnetic energy, or the microwaves, from escaping.
11:26And cooking you, too.
11:28That's how it heats up your food so quickly.
11:31Every microwave has to have one, and they all vary in quality.
11:35This Faraday cage can even stop signals from your phone.
11:38Which I guess is useful.
11:40Hey, you don't need your popcorn to stop popping in order to take a call, do you?
11:44Airplane mode's a bit easier, though.
11:48Ever taken an IQ test and realized you're Einstein-level smart?
11:52Me neither.
11:54The median IQ is only 100.
11:56Plus, there's very little evidence that Einstein ever even took the test.
12:01In the beginning, most people thought the tests were too vague to be helpful in any way.
12:06The test was designed for children who needed help with their studies.
12:09Later, they realized it could be adapted to identify intelligence.
12:13But it was never originally designed for that.
12:17Hey, never pop bubble wrap.
12:20You're missing out.
12:21And you guessed it.
12:22It was never meant to be popped or used in the way we use it today.
12:26It was invented as a new, textured wallpaper.
12:29By sealing two shower curtains together, they created the first bubbles.
12:34The idea never really took off, obviously.
12:37After failing as wallpaper, it discovered its true meaning in life.
12:41It could protect sensitive items.
12:43When the first computers were being shipped, bubble wrap was there to help.
12:48Imagine a house with bubble wrap wallpaper in every room.
12:51Best or worst thing ever?
12:53Hey, leave me a comment below.
12:55If you owned one of the biggest companies in the world,
12:58selling one of the most known products on the planet,
13:01how would you keep your company's secret a secret?
13:04The formula for Coca-Cola isn't patented.
13:08The first recipe was, but when they made changes, no patent ever went through.
13:13The secret formula is still only known by a few people at the company.
13:18Not only that, but not even Coca-Cola's rival wants the recipe.
13:23In 2006, a disgruntled employee tried to sell off the secret, but it didn't work.
13:30Hey, take a look at your brand new mattress.
13:33Do you see the Do Not Remove Under Penalty of Law tag?
13:36Wow, that thing looks pretty serious.
13:39Good news, though.
13:40The tags aren't meant for you.
13:42They're aimed at the mattress seller.
13:44A hundred years ago, mattress makers used to create the filling with basically anything.
13:49Animal hair, old hospital beds, or clothing.
13:52Then, strict laws stopped old hospital beds from being used.
13:56Their mattresses were filled with germs.
13:59Now, on a rainy day, Play-Doh is something everyone can make at home.
14:04Mash up some flour, water, salt, food coloring, and wham!
14:09Any creative person is amused for hours.
14:12Cheap, clean, non-toxic, the perfect modeling clay.
14:15But it was never made for that.
14:18This stuff was originally for cleaning up walls in the 1930s.
14:22That's because people started going crazy for wallpaper, which you couldn't use soap and water on.
14:27Eventually, Play-Doh had to find a new home.
14:31Now, have you ever finished a lollipop and noticed a hole in the stick?
14:36This hole isn't just for show or to make a musical instrument with after you're done.
14:41It's there to keep that tasty sweet treat from falling off.
14:44While the candy's still hot, it's poured into a mold.
14:48As it hardens, the candy flows into the hole and creates an anchor.
14:53Oh, not into lollipops?
14:55How about good old American gummy bears?
14:58Unfortunately, they aren't American at all.
15:00They're German.
15:01A German company started making them in 1922.
15:05The original name was Gummy... something-something.
15:09Anyway, they got the inspiration from real dancing bears at live shows.
15:13These treats eventually made it all the way around the world.
15:18Hey, ever wondered what those little bumps were for on the F and J keys on your keyboard?
15:23These little raised ridges are to help your index fingers be in the best possible spot for lightning-fast typing.
15:30Keeping those fingers on F and J, it makes it way easier to reach all the keys, especially if you
15:36don't look at the keyboard.
15:38Now, everybody loves a slinky.
15:40If you've ever watched one of them strut down the stairs with groovy music in the background, congrats!
15:46You're definitely a YouTube fan.
15:48People of all ages loved it when it came out.
15:51Which is crazy, because it was never meant to be a toy at all.
15:55It's a spring.
15:56It was originally designed to stabilize sensitive nautical devices on ships.
16:02Nothing fun about that at all.
16:03Until that amazing day, when one of them fell off a table and danced its way into our hearts.
16:10After many experiments, the new and improved Slinky was born.
16:14Give that team of scientists a medal.
16:17Now, that little pocket on your jeans wasn't designed for loose change or keys.
16:22It was originally made to store your pocket watch.
16:25You don't have a pocket watch?
16:27How is that possible?
16:28They were all the rage in the 1890s.
16:31But that's not all that makes your old pair of jeans interesting.
16:35Look around the pocket areas.
16:37You'll see rivets sticking out.
16:40No, they're not some cool fashion idea from the past.
16:43These rivets serve a very crucial role.
16:46They help protect the sensitive areas of the jeans that get the most wear and tear.
16:50Back in the day, most people wore jeans to do hard manual labor.
16:54So, they needed to be tough.
16:56If those guys back then saw you paying $100 for a pair of ripped jeans,
17:01they'd probably pass out from shock.
17:04So, get this.
17:05An extra hole at the upper part of the sink has multiple hidden functions.
17:10First, in case someone forgets to close the tap,
17:13the water won't overflow and the bathroom won't get flooded.
17:16Second, thanks to that hole, the water drains faster
17:19as it gives an escape for the air helping the water flow down.
17:23Those two holes on the side of any Converse shoe
17:26are not there only to let the stinky air out.
17:29Sure, breathability is important for any athlete.
17:33But the second reason is that athletes lace through those holes to get a better grip.
17:38Donuts have a hole in the middle, and it doesn't stand for O in donut.
17:42It's not designed for an easier grip either, although it can be quite convenient.
17:46It's actually made this way for mass baking,
17:49so that they cook all the way through evenly.
17:53Most metallic zippers have a hidden lock inside them
17:56to save you from awkward situations such as an undone fly.
18:00Oh boy.
18:01Don't leave the zipper handle in an upward position.
18:04When you pull it downwards, it automatically locks.
18:07It's all thanks to those tiny grooves hidden underneath the handle.
18:12Almost any public toilet has a large gap between the floor and the door.
18:17The reason for such a zero-privacy thing is to actually minimize the level of privacy and comfort,
18:23so that people wouldn't stay there long and there'd be no lines.
18:27It's also easier to clean and safer if some emergency occurs.
18:32Spoiled milk emits gases, like most foods when they go bad.
18:36A classic plastic milk jug has a concave shape on one side.
18:40So when the gases expand inside the jug, it expands too, and the concave shape curves out.
18:47Also, if you want to save some milk for later and freeze it,
18:50the jug will expand when the milk gets solid as well, occupying more space in a jug.
18:57Headrests in a car are about comfort, and detachable headrests are about safety.
19:02If you pull the headrest out of the seat, you'll see two bars, which are quite sturdy.
19:07If you ever get locked or trapped in a car,
19:09you can get out of there smashing the window with one of these bars.
19:14Bath foam isn't only for fun or a nice smell.
19:17It also helps regulate the temperature.
19:19The bubbles keep the water hot, so you can enjoy a bath a bit longer.
19:23Anyway, it works for acrylic bathtubs only.
19:26Those made of metal lose heat really fast either way.
19:31Many cups and mugs have little grooves on the bottom on purpose.
19:35They're designed for dishwashing machines.
19:38The grooves let the water flow and not spill over your feet when you take the cup out.
19:43Also, those grooves let the air flow, so the cup doesn't crack even if the tea is scalding.
19:49Almost all measuring tapes have a metal tip with a small slot on the end.
19:54You can use this slot to hang the tape on a nail or a screw and make measurements without anyone's
19:59help.
20:00Sometimes, this tip has a row of sharp points along the edge on one side.
20:05That comes in handy when you want to leave a mark without using a pencil.
20:10Doorknobs are usually made of brass, bronze, and some other copper alloys for a reason.
20:15They have an antibacterial effect, so they stop microbes from spreading.
20:19They get rid of a range of harmful germs pretty fast, within a couple of hours.
20:24But don't forget to wash your hands anyway.
20:27Grocery carts have loops for a reason.
20:30You don't want to put your jacket in a cart next to potatoes and onions.
20:33Hang it on a loop.
20:35This little hook-like thing is here to help you better organize the space in your cart.
20:40The carts also have a super handy grid.
20:43Whenever the cart's full, you just need to lift the grid and attach the shopping basket for extra purchases,
20:49placing it in between the horizontal bar above the wheels and the hook the grid has.
20:55A point on an ointment cap is there for a reason too.
20:58Most tubes are usually sealed with foil, and it's better to avoid opening it with fingers unless you're ready to
21:04say goodbye to your nails.
21:06A point easily opens even the most safely sealed tube.
21:11A pack of cotton pads has those strings on it so that we could hang it on some hook or
21:16holder.
21:16And no, there's no need to untighten and tighten the pack again.
21:20Look at the bottom of the pack.
21:22It has a perforated line.
21:23Tear along it, and now you're good to pull out a cotton pad.
21:28If you've ever tried a Nintendo cartridge to taste, you'll confirm that they taste revolting, leaving a sour, bitterish aftertaste
21:37in your mouth.
21:37They're covered with denotonium benzoate, one of the most disgusting flavors ever known.
21:44Actually, this taste is kind of a hidden function.
21:46It prevents people from swallowing those cartridges.
21:50Silica gel can often be found in different things you buy, like bags, shoes, and many others.
21:56Don't throw it away.
21:57It's meant to absorb excess moisture, so anytime your shoes are a bit wet, just throw in a packet with
22:03silica gel.
22:06Escalator brushes aren't for keeping your shoes clean or polished.
22:10It's for our safety.
22:12Brushes won't let you come close to the edge, so a long coat or bootcut jeans won't end up between
22:18the steps.
22:19Rough edges on the dimes aren't just about design.
22:23The coins used to be made of precious metals to show their real value.
22:27People would shave off the edges, spending the shaven coins with the same value, and melt the edges into new
22:33coins.
22:34To avoid it, minters added that pattern so people could tell if someone cut that coin before.
22:40Ever notice a tiny hole on the bottom of a padlock?
22:43Its hidden purpose is to drain water to help avoid corrosion.
22:48It's always the most convenient place to lubricate a padlock.
22:51A drop of oil in there will make it open and close easier.
22:55Bottles have long necks for a reason.
22:58Hold the neck, not the bottle, if you want to enjoy a cold drink.
23:02Same goes for fancy glasses.
23:04Their stem saves any drink from overheating.
23:07So, hold it right.
23:10Notebook margins are not some extra space for note-taking.
23:13In fact, people invented them to protect their notes.
23:16People used to co-live with rats, and these guys like gnawing on everything they see on their way, including
23:23paper.
23:24Still, rats weren't able to chew more than the space left on the margins.
23:29That black grate on a microwave isn't just some fancy decoration.
23:33It's called a Faraday shield.
23:36And it prevents the rays from escaping the microwave.
23:39It also speeds up the heating, so you could enjoy yesterday's leftovers faster.
23:43It may also block phone signals, so if you're tired of numerous calls, just put the phone into a microwave.
23:50But don't turn it on.
23:52All Tic Tac containers are designed to dispense one Tic Tac every time you open it.
23:57The lid has the same shape as the candy.
24:00Turn the container upside down, gently shake it, and slowly open it.
24:04You'll notice only one candy stuck between those lid grooves.
24:08So, if you just open the container and shake it until five or more candies fall into your mouth,
24:13that means you've been eating Tic Tac wrong all this time.
24:17Those little holes in the airplane windows are designed to control the cabin pressure.
24:22They also protect the windows from fogging up as the temperatures drop and rise.
24:27By the way, the airplane window is round for a reason.
24:31This way, pressure is evenly distributed, so it doesn't get deformed.
24:35Blue bristles on a toothbrush are actually an indicator that it's just about time to change the brush.
24:41As the bristles get in contact with water, the blue or whatever other pigment fades away.
24:47So, the more you use it, the duller the color becomes.
24:51A triple handle on a jerry can is there to make it easier for two people to carry it and
24:57distribute the fuel evenly.
24:59Gas cans often have a second hole that actually needs to be uncapped too before you pour the gas.
25:04The air passage will prevent it from pouring out, so no more fuel waste.
25:10The tab on the rearview mirror does have a function.
25:13It holds your air freshener, a pair of foam dice, your graduation tassel, and some other useful stuff.
25:20But in fact, it works as a tumbler between day and night mode.
25:24It helps hold the glare from the car behind you.
25:26Those car lights can blind you.
25:30In a supermarket, you pass by a shelf with eggs and try to decide which ones are better, the white
25:36ones or the brown ones.
25:37There's practically no difference between them.
25:40The egg's color depends on the breed of the chicken.
25:42These birds produce two different color pigments.
25:45You can take eggs of any color because the nutritional components of the eggs are almost the same.
25:50So, what came first, the brown egg or the white egg?
25:54Eh, never mind.
25:56It's enough to use a small amount of toothpaste to brush your teeth, the size of a pea.
26:01But the ads show that you have to cover the entire toothbrush with paste as a marketing ploy.
26:07Manufacturers want you to buy a new tube faster.
26:10A plane leaves white lines behind in the blue sky, thanks to the condensation of carbon dioxide, steam, and burning
26:17fuel.
26:18In winter, heated air visibly comes out of your mouth.
26:21The same principle works here.
26:23It's always icy at the altitude where planes are flying.
26:27Exhaust and hot air comes out of the turbines.
26:29When it collides with cold air, it creates thick lines of steam.
26:34Almost all hotels have white bedsheets.
26:37They choose this color specifically to show how high their standards of cleanliness are.
26:42The whiter and brighter the sheets are, the more luxurious the hotel seems.
26:46It's much easier to see dirt and stains on white linen.
26:49It's like proof that you've checked into a cleaned room.
26:53Gasoline looks like a rainbow in a puddle because it can't mix with water.
26:57It forms a thin membrane over it.
27:00When light reflects from it and the water at the same time, you've got a rainbow.
27:05The Do Not Disturb sign on your hotel room door is not a requirement but just a suggestion.
27:11Maids and staff have the right to go there if they suspect something's wrong.
27:16Especially if you don't remove the sign for 24 hours.
27:19Why do clocks go to the right?
27:21The sun is the main reason.
27:23In ancient times, when people invented the sundial,
27:26the sun's shadow was moving to the right in the northern hemisphere
27:30and to the left in the southern hemisphere.
27:33Mechanical clocks were first invented in the northern hemisphere.
27:36So, it always goes right.
27:38Or, as we now say, clockwise.
27:41Why are the cups at parties colored red?
27:44Because it helps you quickly find your drink on the table among snacks and drinks.
27:48And all those other red cups.
27:50Here's a hint.
27:51Write your name, Michael, on the cup.
27:53If your name is Michael.
27:55Also, red is considered a color that provokes action.
27:58At the psychological level, it seems the red cup is commanding you,
28:03Hey, drink me up!
28:04They believe yellow taxis have their roots in 15th century Italy.
28:09One postal businessman used yellow cabins for delivering mail.
28:13He wanted everyone to recognize his carts.
28:16About 60 to 80% of people, mostly aged 15 to 25,
28:21occasionally have goosebump-induced déjà vu moments.
28:25It's fleeting and unpredictable,
28:27and scientists are still not 100% sure why it happens and can't control it.
28:32To understand it better, they tried to create memories for patients under hypnosis.
28:38Then, they asked them to forget or remember the memory,
28:41and it made them experience déjà vu later.
28:44Other scientists tried to recreate it in virtual reality with scenes and games that looked alike.
28:49The experiments made them believe déjà vu is your memory playing tricks on you.
28:54You get into a situation that's similar to a real memory that you have,
28:59but you can't remember it completely.
29:01Your brain notices the similarities and leaves you with a strange feeling of already seen.
29:06That's how déjà vu translates from French.
29:10Another version is that it's a memory glitch.
29:12It's more likely to happen when you're stressed.
29:15So, when you're under pressure or have a lot of information to process at once,
29:19some of it can end up in long-term memory instead of short-term memory.
29:24So, you take your best friend Max to the doggy park.
29:27He meets the labradoodle of his dreams, and they start playing together.
29:31Peaceful tail wagging quickly grows into biting each other.
29:35Oh no, they're going for the necks!
29:38You grab Max and rush back home.
29:40Well, in fact, there was no need to rush home.
29:43Playing with open mouths is called mouth wrestling or jaw sparring.
29:48It's a healthy way of interaction between dogs.
29:51They inherited this habit from their wolf ancestors.
29:54When a dog is a puppy, it has to learn some important skills, including fighting.
29:59Mouthing is just an imitation of it.
30:01When a puppy matures, it will know how to protect itself and respect boundaries of other doggos.
30:07All the chasing, wrestling, growling, and face-biting is a way to socialize with others and have fun in the
30:13dog world.
30:14It's something like sibling rivalry and playful fights in the human world.
30:19Cute kittens and cats under the age of two also practice mouthing.
30:23They often tumble over each other and bite one another's necks to let their hunter instincts out.
30:28In the wild, cats are fast and merciless, and they can't hide it behind all the purrs in the world.
30:36Playbiting with other kitties can also teach your little Mr. Biscuit to be more gentle when it plays with you
30:41and other humans.
30:42So, it's all good.
30:44Cats like to sharpen their claws on your furniture to leave a visual mark on their territory.
30:49They also do it to let their claws renew and stretch their back and shoulders.
30:53The couch seems perfect for it, because it's not too short and is sturdy enough.
30:58Well, you gotta find a good replacement with the same qualities to let your kitty scratch and release its emotions.
31:05Cats freak out when they see a cucumber because it looks too much like their long-time enemy, snakes.
31:11They're naturally programmed to jump up in the air to protect themselves from a bite.
31:16Anything that looks similar, from toys to eggplants, causes a similar reaction.
31:21It's never a good idea to show them things like that for fun.
31:24It can really mess up their mental health.
31:27Fish have gills and fins, but they don't have necks.
31:30Instead, they have a series of bones that connect their skull and shoulder girdle.
31:36One of the reasons for that is it would be really hard to be fast while swimming if they had
31:41a neck waggling back and forth.
31:43Plus, the moment a creature similar to a fish developed a neck,
31:47science automatically classified it as another group of animals.
31:51That means the official definition says if a creature has a neck, we can't call it a fish.
31:56The oldest neck scientists have on record belongs to one unusual creature that lived 375 million years ago.
32:04It was part fish and part tetrapod, which is a term for an animal with four limbs.
32:10Now, rain won't always make the ground wet.
32:13There are very hot and dry areas where rain can evaporate even before it gets to the ground.
32:18It's something called phantom rain.
32:20You can see dense curtains of drops coming from above, but at the same time, nothing's on the ground,
32:26and none of the water reaches the living beings.
32:30Rats laugh when you tickle them.
32:32They mostly giggle when being tickled, and during one experiment where researchers tickled them,
32:37they even chased after their hands in a playful manner.
32:40All of the great apes, which is a group that includes gorillas, orangutans, bonobos, and chimpanzees,
32:46are ticklish too, and generally respond to tickling with a pretty distinctive human-like laugh.
32:51Penguins, dogs, meerkats, and many others also seem to pretty much like it.
32:57Different nations have different systems when it comes to vehicle registration, including license plate color.
33:04Australia goes with an unlimited palette when it comes to plates.
33:07They include many different motifs and designs.
33:10In the UK, cars have two possible number plate colors, yellow at the back of a vehicle and white at
33:17the front.
33:18Both have black characters.
33:20Now, it wasn't always like this.
33:22Number plates in this country used to have either white or silver characters.
33:26But starting from 1979, all vehicles must have the exact plates we see today for a reason.
33:32Every registration plate must be made from reflective material.
33:36So, if the number plate at the back of your car is white, it might reflect white light, which is
33:42not legal.
33:43Elephants have enormous ears, and normally they can hold them out to scan noise back and forth.
33:48But there are sometimes distant vocalizations and noise they can hear with their feet.
33:54When they detect something that's far away, elephants freeze and lean forward.
33:59They transfer weight to their front legs and may even lift up a front foot.
34:03Hmm, hearing with your toes, that's quite a feat.
34:07Hmm.