"Today I Learnt"

[Oegyein]

How big can copper pipes be before they aren't pipes?

How big does any pipe have to be before it's a tunnel?

 

[Apricity]

Depends on your measurement system.

I prefer furlongs per fortnight.

 

[Avidro]

How big can copper pipes be before they aren't pipes?

They can be microscopic. It doesn't matter, as long you can write "NOT A PIPE" on them somewhere.

 

[Rue]

TIL that Hanson is still making music

 

[bicyclesonthemoon]

Not exactly today, but recently I discovered this website:

Archives - Bartosz Ciechanowski

It has some interesting explanations illustrated by interactive 3D animations
of various stuff,
including bicycles, clocks, colors, ...