To the left you will see the original doodle done by Francis Crick when he theorized the shape of DNA. Crick, who was one of the two people who discovered DNA, died last year and now the US National Library of Medicine and the Wellcome Trust are digitizing over 11,000 pages of his work.  You can freely view and download any of his collection here.

To me this is the greatest part of the Internet.  If you had told me when I was in college that I could sit in my living room and easily search through millions of pages of information while sitting on my couch I would have said that you were crazy.