A cartoon to help in teaching the importance of labeling the axes of a graph. The cartoon is number 833 (December 2010) from the webcomic series at xkcd.com created by Randall Munroe. Free to use in the classroom and on course web sites under a creative commons attribution-non-commercial 2.5 license.
All life is an experiment. The more experiments you make the better. is a quote by American author and poet Ralph Waldo Emerson (1803 - 1882). The quote was written as a journal entry on November 11, 1842.
Don 't worry about polls, but if you do, don't admit it. is a quote by former First Lady Eleanor Rosalynn Smith Carter (1927 - ).
Theory is a good thing, but a good experiment is forever. is a quote by Russian nobel prize winning physicist Pyotr Leonidovich Kapitsa (1894 - 1984). The quote is found on page 160 of "Experiment, theory, practice, articles and addresses volume 46."