Everything that appears on chemistnate.com​ is uncopyrighted.

• That means I’ve put them in the public domain, and released my copyright on all these works.
• There is no need to email me for permission — use my content however you want! Email it, share it, reprint it with or without credit. Change it around, put in a bunch of swear words and attribute them to me. It’s OK.
• Attribution is appreciated but not required.

If you'd like more information about this arrangement, read ZenHabits' Uncopyright explanation.