What do the humble pencil eraser and oxygen have in common? Yup, they were both discovered by Joseph Priestley (1733-1804).
What a guy! He was a chemist, theologian, biologist, teacher and philosopher... he published over 150 works, founded Unitarianism in Great Britain, and was so outspoken in his beliefs about human rights and attempts to reconcile religion and science that he had to go on the lam and escape to the United States.
And somewhere along the line, he discovered that rubbing a piece of latex rubber on paper would erase pencil lines. For that, bridge players should be eternally grateful.
Let's get to work!