TIL Obsidian can be made into a scalpel with a cutting edge of 3 nanometers. A strand of DNA is 2.5 nm, a sheet of paper 100,000 nm

http://en.m.wikipedia.org/wiki/Obsidian



Submitted February 10, 2015 at 01:44PM by icantgetthenameiwant http://www.reddit.com/r/todayilearned/comments/2vedku/til_obsidian_can_be_made_into_a_scalpel_with_a/