13 Mysterious Details on Everyday Objects Explained

We’re so used to seeing certain everyday objects that we often ignore their little but important details. Yet, some of the most ingenious ideas are often hidden right in plain sight.
If you look closely at a tram's overhead lines, you'll see that its contact wires zigzag back and forth instead of going in a straight line. As the tram moves, the arm-like structure called a pantograph attached to its roof slides along the wire, and it wears down evenly.
In a standard 52-deck of cards, the King of Hearts looks kind of strange. Some historians argue that the King of Hearts represents Ajax the Great while the Queen of Hearts is Helen of Troy, the most beautiful woman in the world. Ajax was one Helen’s admirers, but when she refused him, he chose to commit suicide by stabbing himself with his own sword.
Have you ever noticed how many spikes are in the crown of the Statue of Liberty, and do you know what they represent? There are seven of them, and they represent the seven seas and seven continents of the world.
Is your first thought when playing video game consoles to eat the cartridges? Well, apparently that’s what the manufacturers of the cartridges for the Nintendo Switch thought when they decided to coat them with a bitter-tasting non-toxic solution.
Most people assume that the tiny hole on the tip of a pen cap is there to even out the pressure so that the pen doesn’t leak. In fact, it’s to save a person who might accidentally swallow the cap and choke on it. Their airway won't be completely obstructed.

w:Period-after-opening symbol on a bottle of mouthwash: By I, Trounce, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, https://commons.wikimedia.org/w/index.php?curid=2389837
Animation is created by Bright Side.

Music: Creepin MK2
https://www.youtube.com/audiolibrary/music

TIMESTAMPS
A tram’s mysterious zigzags 0:37
Who killed the King? 1:20
The Royal Coat of Arms of the United Kingdom 2:37
The open jar symbol on cosmetics packaging 3:15
The Statue of Liberty's crown 4:05
Blank pages in books 5:08
Colorful toothpaste 5:37
Bitter Nintendo Switch cartridges 6:22
Numbers on Heinz packets 6:59
The hole in the cap of a ballpoint pen 7:44
Little bumps on the “F” and “J” on your keyboard 8:20
Indentations on the bottom of wine and champagne bottles 8:41
Tiny holes in airplane windows 9:17

SUMMARY
-All trams have an arm-like structure called a pantograph attached to their roofs. To wear it down evenly, the wire isn’t installed strictly along the tram's straight path but in a zigzag instead.
-There are 3 theories explaining why the King of Hearts is the only king who appears to be sticking his sword straight into his head.
-When the one-, two-, five-, ten-, twenty-, and fifty-pence pieces are laid out together, they form The Royal Coat of Arms of the UK.
-To find out how long you can safely use your makeup for, look for the little open jar icon called the PAO (Period After Opening).
-The Statue of Liberty has seven spikes in her crown, and they represent the seven seas and seven continents of the world.
-Book pages are often printed on large sheets of paper rather than on small individual ones. And if there isn't enough content to fill these sheets, there will be blank pages.
-It turns out that each stripe in the toothpaste has different ingredients and purposes: the white part helps whiten your teeth and remove plaque, the blue (or green) gel has antimicrobial and breath-freshening effects. The red part contains crucial elements for healthy gums.
-The bitter taste of the cartridges for the Nintendo Switch is meant to make children spit out the cartridge in disgust.
-The numbers in the upper right corner of Heinz packets indicate which filling line the packet was filled on.
- If a person accidentally swallows the ballpoint pen cap and chokes on it, their airway won't be completely obstructed thank to the little hole in it.
-The little bumps on the “F” and “J” on the keyboard help experienced typists that can do their work without looking at the keyboard find “home keys” where the index fingers rest.
-Indentations on the bottom of wine and champagne bottles are there to prevent because the bottom and sides of the bottle from cracking when the bottle is being corked.
-Tiny holes in airplane windows help balance out the air pressure and prevent the windows from fogging up.

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