A silhouette of Albert Einstein cut from a page from "Einstein's Universe" by Nigel Calder. I picked a page from the chapter on gravity, called 'The Galileo Mystery'.
Don't worry. I didn't really cut-up my copy of Einstein's Universe. The relevant page was scanned and edited with software, using a multi-step masking and reverse process. The slight yellowing of the paper comes honestly from the age of my original book, printed in 1979.