Does Obsidian Really Form the Sharpest Edge?
11:32
The Sharpest Object In The World Can't Cut Anything
19:13
Cutting mirrors with Diamonds
14:01
Can You Melt Obsidian and Cast a Sword?
10:10
Easy Way To Sharpen A Chisel As Sharp As A Razor
19:27
Give Me 2 Dozen Old Drills And I'll Make The Sharpest Knife That Will Last 50 Years
16:40
I never understood why you can't go faster than light - until now!
16:14
Can You Forge Tungsten?
11:45