Image Credit

Description:
A side by side picture of a low density and high-density painting created by Yves Tanguy
Source:
Composite by Kristin Strong, Science Buddies; source images: Wikipedia Commons
License:
Fair use
Source URL:
http://en.wikipedia.org/wiki/File:Mama,_Papa_is_Wounded!.jpg, http://en.wikipedia.org/wiki/File:Multiplication_of_the_Arcs.jpg




