|Royal Society of London Open Access|
The Royal Society open archive announcement coincides with Open Access Week, and celebrates free access to any article published more than 70 years ago. This is remarkable, considering the historically significant research findings published by the Royal Society. Try the advanced search at the Royal Society site, and you'll find that the publication date range extends back to 1665. There are not many (any?) other sites on the Internet where you can find such an authentic and rich archive of scientific discovery. Explore!