Name: That's Why Most Erasers Are Pink
Uploaded: 2020-01-09T06:46:48.000Z
Duration: 8 min 40 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

Adverbs of manner

If you're like me, and who wouldn't want to be (ha), then you probably also wake up

at 3 AM sometimes with a flood of urgent questions in your mind!

And, most importantly, is there a reason most erasers are pink?

Ever paid attention to those metal or plastic tips on the ends of your shoelaces?

Sure, they keep the strings from fraying, and they make lacing your shoes much less

But here's the surprising bit: they appeared in ancient Rome, where people made them out

The reason why the computer mouse is named after that cute little rodent is easy to explain:

the thing is quick and small, and not too long ago, it used to have a cord connecting

it to the computer that looked like a tail.

But when the first computer mice appeared, producers referred to them as turtles.

They're covered with a hard shell, and all the moving parts are underneath this “shield.”

Obviously, webcams let you see your friends and relatives who can be halfway across the

But few people know that the web camera was created with a bit less noble purpose.

It was 1991, and Cambridge computer scientists were getting frustrated.

You see, every time they went to the coffee machine for a cup of Joe, there wouldn't

One day, they'd finally had enough and simply invented the world's first webcam!

They placed the camera next to the infamous coffee pot with a perfect view to check the

Then they'd know right from their desks if the trip would be worth the effort!

What would childhood be without hours spent sending a Slinky down a staircase?

The popular toy has been around for over 70 years, but there's more to the Slinky than

stair-time fun (and lots of tangles): its older metal version used to serve as a makeshift

And in 1985, one Slinky even made it to space!

Unfortunately, it refused to slink in zero gravity.

Astronauts reported that it just "drooped."

Paper money isn't the most reliable form of cash because bills tend to wear out faster

For example, a US 1-dollar bill usually lasts for only 18 months – after that, it must

be withdrawn from circulation and replaced.

A 5-dollar bill goes a bit longer – for 2 years, a 10 - for 3 years, and a 20 – for

As for 50- and 100-dollar bills, they last the longest – 9 whole years!

And get this: the US Mint prints 37 million bills a day, but 95% of them go to replace

old ones that are dirty, torn, faded, and unusable.

Hey, I'll be happy to take that dirty, torn and faded cash!

T-shirts were invented at the beginning of the 20th century.

In 1904, Cooper Underwear Company advertised them as a perfect product for bachelors who

couldn't sew or reattach buttons to their shirts.

Back then, you were supposed to wear a T-shirt under your collared shirt as an undergarment.

Oh, and all T-shirts at that time were white – no funny prints or bright colors.

In 1957, engineers Alfred Fielding and Marc Chavannes decided to seal two shower curtains

together with tiny bubbles of air stuck in between.

It was supposed to be a cool new idea for a wallpaper!

Unfortunately for them, nobody was interested in bubbly wall décor.

But in 1961, people realized that this bubble wrap could be great protection for fragile

The company's first client was IBM, who used the stuff to cover their computers during

I don't know, I'm kind of into the wallpaper idea now that I think about it – imagine

Ok, I know they now come in all colors and shapes, but I'm talking about that classic

When a stand-alone eraser appeared in 1916, it was made mainly of rubber and pumice.

Without the pumice, the thing didn't have enough friction to erase pencil marks.

Pumice could be white or red, and the color of an eraser depended on the hue of this volcanic

That year, the Eberhard Faber Pencil Company started to add pink pumice to their erasers,

which became popular under the name "Pink Pearl."

Nowadays, producers don't use pumice or natural rubber for their erasers anymore.

But they decided to keep the color as an homage to history!

Electric fans don't actually cool the air.

If you put a thermometer anywhere close to the working parts, you'll see the temperature

The device speeds up the evaporation process, making sweat on your skin colder.

Rice is the product people have been cultivating for the longest time: from 12,000 to 15,000

It first appeared in ancient China's Pearl River Valley thousands of years ago.

The only other food that's almost as old is corn.

Native people in Mexico started growing it between 7,000 to 12,000 years ago.

The keyboard you use today was originally designed to slow you down!

Subtitles ListPlay Video

That's Why Most Erasers Are Pink

stick

ancient

cultivate

purpose