The three types of rock October 21st, 2011 • Filed under: geology | humor Hah. My sister sent this to me. Related Posts The Size of This World Never Ceases To Amaze Me January 21, 2006 field-camp | new-zealand Word of the Day game August 13, 2010 Toy Story + The Wire June 17, 2010 ← Previous Post Extrapolating the screen size of Android mobile phones over time. Next Post → Stop SOPA