Three Gears are Possible - Numberphile
9:59
What makes planetary gearboxes so amazing?
10:43
Bertrand's Paradox (with 3blue1brown) - Numberphile
8:06
Tunnelling through a Mountain - Numberphile
17:14
Building a Giant 3D printer to 3D print myself
22:19
10 Free Prints to Make Friends Suffer!
16:06
Top 9 des machines à balles les plus satisfaisantes
9:48
Are odd-numbered mobius-loop cogs possible?
9:59