The reason why fountain pens can write smoothly is not just the result of capillary action.

A video of Chinese calligraphy

Mine゛

8.1K Views

【Ten Color Numbers I Often Use】Paperless Learning｜Learning Good Things｜Not Voice Control｜

Yyunann

21 Views

The first time I saw such a fun pen! Am I the last one to know?

Jiezhumeng

7.7K Views

【Art】The Double-Colored Mark Pen

Siyi

481 Views

Can a gun shoot through two A4 sheets of paper? A pen gun and bullet that can be made with just two

xiami123m

8 Views

Why did the steel fly so high in the flying steel accident? #Science #Unzip #RollingSteel #FlyingSte

haoqiwanhuatong

9 Views

Can cliff skiing cause an avalanche? #Science #Unwind #CliffSkiing #Avalanche #Trivia

haoqiwanhuatong

14 Views

Why do we need to install a wellbore when digging a well? #Science #Unzip #IncreaseKnowledge #Diggin

haoqiwanhuatong

8 Views

Why do we need to grind off the bark? This is the process of peeling and rounding the wood before pe

haoqiwanhuatong

34 Views

Why should you clean your car's exhaust pipe? #Science #Unzip #Car #Cleaning #Trivia

haoqiwanhuatong

14 Views

Why does a well spout gas? #Science #StressRelief #Drilling #Well Blowout #FunFacts

haoqiwanhuatong

16 Views

Why do we need to cut a slant on the tree when felling it?

haoqiwanhuatong

10 Views

How to lay a qualified asphalt road? #Science #Unzip #Paving #Knowledge

haoqiwanhuatong

10 Views

【Guang Yuan】When Pei Su fell asleep on the subway

Xiaoyuanlianyaokuaileya

47 Views

How harsh is the environment on a polar research vessel? #PopularScience #Unzip #ResearchShip #Polar

haoqiwanhuatong

28 Views

What modifications can be made to an excavator? #PopularScience #Unzip #LargeMachinery #Excavator

haoqiwanhuatong

14 Views

Why is steel colored after cutting? #Science #Unzip #Metalworking #CoolKnowledge

haoqiwanhuatong

14 Views

Why are the joints of steel cables so strong? #Science #Unzip #SteelCable #MachineryManufacturing #E

haoqiwanhuatong

11 Views

When a rotary drilling rig is used to drill and pile, why is the hole filled with mud?

haoqiwanhuatong

10 Views

Ultraman Ace: The Yabo people actually let humans breed super beast babies for them

muyuxiaoniuniu

12 Views